The DP4 Microneedling Pen: A Complete Guide

Microneedling has traveled a long way from dermatology procedure rooms. Today, the DP4 microneedling pen sits at the intersection of that shift — a professional-grade motorized pen device that practitioners use in clinical settings and that trained individuals are increasingly exploring for at-home use. If you are researching this device, you are probably asking one of three questions: what exactly is it, does it work, and what do you do with your skin afterward? This article answers all three in plain language.

What most device guides skip — and what matters just as much as the treatment itself — is the recovery window. The 72 hours after a microneedling session are when your skin is most vulnerable, most receptive, and most in need of the right support. We will cover the device, the treatment experience, and the day-by-day recovery in equal depth. If you are still comparing options, our broader roundups of the best microneedling pens and devices and the best microneedling pen for different needs and budgets may also be helpful starting points.

This article is general consumer education. It is not a substitute for personalized guidance from a licensed skincare professional, dermatologist, or plastic surgeon. When professional consultation matters, we will say so clearly.

What Is the DP4 Microneedling Pen by DP Derm?

The DP4 is an electrically powered, oscillating-needle microneedling pen manufactured by DP Derm, a company focused on professional-grade skin needling devices and associated protocols. DP Derm positions itself within the medical aesthetics space, and the DP4 is designed with the depth range and motor consistency expected in a clinical or med-spa environment.

The device uses a pen-style handpiece with a disposable, single-use sterile needle cartridge that attaches to the tip. Needle depth and oscillation speed are adjustable — the depth range typically spans from a fraction of a millimeter up to around 2.5 mm depending on the cartridge configuration, though you should verify current specifications against the manufacturer's own instructions for use (IFU) before making any treatment decisions. The cartridge is replaced between every client or every session, which is a core sterility requirement and not optional.

The phrase "professional-grade" gets used loosely in the device market. In the context of the DP4, it refers to the build quality of the handpiece, the consistency of the motor across treatment passes, and the depth range that extends into ranges appropriate for addressing deeper skin concerns when used by a trained practitioner. It is not a guarantee of any specific result.

Regulatory note: Before using or recommending any microneedling device, the regulatory clearance status matters. In the United States, microneedling pens used for clinical indications may require FDA 510(k) clearance; in Canada, devices are listed through Health Canada's Medical Device Licence (MDL) system. Verify the DP4's current regulatory status through the FDA 510(k) database or Health Canada's device registry before purchase, particularly if you are a practitioner. Regulatory status can change, and this article does not substitute for that verification.

How Does a Microneedling Pen Work?

Understanding the mechanism is not just background information — it is the framework for understanding why aftercare is as important as the treatment itself.

The DP4, like other motorized microneedling pens, works by driving fine needles into the skin in a controlled, vertical stamping motion. The handpiece oscillates rapidly, creating thousands of microscopic punctures — called micro-channels — across the treatment area. These micro-channels are not random damage. They are controlled, calibrated injuries designed to activate the skin's own healing response.

This process is called collagen induction therapy (CIT). The core idea, grounded in wound-healing biology, is that when the skin detects injury, it responds with a structured repair sequence. That sequence unfolds in three overlapping phases. The first is the inflammatory phase, which begins immediately and typically continues for the first day or two. Immune cells arrive at the site, the area becomes red and warm, and the skin releases growth factors and signaling molecules. The second is the proliferative phase, during which new collagen and elastin fibers begin to form and the skin starts rebuilding its structure. The third is the remodeling phase, the longest of the three, during which that new collagen matures and reorganizes — a process that continues for weeks to months after a single session.

This is why the results from microneedling are not immediately visible in the way that, say, a chemical peel might be. The surface-level redness fades within days, but the deeper collagen work is ongoing. It is also why the immediate post-treatment window matters so much: during the inflammatory and early proliferative phases, the skin's barrier is compromised, micro-channels are open, and whatever you apply to the skin has significantly greater access to deeper tissue layers than it would under normal circumstances. That is an opportunity — or a risk — depending entirely on what you put on your face.

How Many Needles Are in the DP4 Microneedling Pen

Microneedling pen cartridges are typically available in several needle configurations, and the DP4 is no exception. Common cartridge options include 12-needle, 16-needle, 24-needle, and 36-needle arrangements, with the number of needles influencing the density of micro-channels created per pass. Nano cartridges — which use much shorter, finer pins — are also available from various manufacturers for surface-level treatments focused on product infusion rather than deep collagen stimulation.

The right cartridge for a given treatment area and skin concern is a clinical decision. Higher needle counts do not automatically produce better results; they produce different coverage patterns and are suited to different tissue types and treatment goals. A practitioner will select the cartridge configuration based on the area being treated, the depth required, and the patient's skin condition. Always confirm current cartridge specifications directly with the manufacturer or your supplier, as product lines are updated.

Types of Microneedling Pens

The DP4 exists within a broader market of motorized microneedling pens, and understanding the landscape helps put the device in context. Broadly, microneedling pens fall into a few categories based on their intended use environment and feature set.

Professional clinical pens are designed for use by licensed practitioners — dermatologists, plastic surgeons, medical aestheticians, and trained nurses — in supervised settings. These typically feature the widest depth range, the most consistent motors, and are sold through medical distribution channels. The DP4 is positioned within this category.

Med-spa and aesthetic professional pens occupy a middle ground — built for trained aesthetic professionals working outside purely medical settings. Build quality and depth range vary considerably across this category, and the buyer needs to evaluate each device's specifications carefully.

Consumer or at-home devices are purpose-designed for personal use, generally with capped maximum needle depth to reduce the risk of injury in untrained hands. These are sold directly to consumers and carry a different risk-benefit calculation than professional devices. The DP4 is not in this category — an important distinction we will return to in the safety section.

Difference Between Dermapen and Dr Pen

Two names you will encounter repeatedly when researching microneedling pens are Dermapen and Dr. Pen, and they are frequently confused or conflated. They are distinct brands with different origins, distribution models, and market positions.

Dermapen is an Australian brand that was among the first to commercialize the motorized microneedling pen format for clinical use. The Dermapen 4 (also sometimes abbreviated DP4 in casual usage — a source of genuine naming confusion) is marketed as a professional-only device with a specific focus on clinical protocols and training. The brand emphasizes practitioner certification and controlled distribution.

Dr. Pen is a separate brand — often spelled with a period — that produces a range of microneedling pens at various price points, including devices sold to both professionals and consumers. Dr. Pen devices are widely available through retail channels and have a large user base among at-home practitioners and aesthetic students.

The DP4 by DP Derm is a third, distinct entity — not the same as the Dermapen 4 and not affiliated with Dr. Pen. If you are researching based on an abbreviation or a recommendation, confirming the full brand name and manufacturer before purchasing is important.

DP4 vs Dr Pen Microneedling

When comparing the DP4 by DP Derm with Dr. Pen devices, the honest comparison comes down to three variables: intended use environment, depth and speed specifications, and cost and distribution.

The DP4 is positioned as a professional clinical device with a corresponding price point and distribution model. Dr. Pen offers a range of devices — from entry-level consumer models to more capable professional-tier pens — at generally lower price points and through wider retail availability. Dr. Pen's accessibility is one of its defining features; its broad market reach means that cartridge availability and user community support are generally robust.

For a trained professional evaluating which device to use in a clinical setting, the decision should be based on verified device specifications, regulatory status, cartridge compatibility and availability, and the specific treatment protocols the device is intended to support. For a consumer, the more fundamental question is whether a professional-grade device is the appropriate choice at all — and whether whatever device is chosen is being used safely and with appropriate training.

Do Microneedling Pens Work At All?

This is the reasonable first question, and it deserves a measured answer.

The mechanism behind collagen induction therapy — controlled micro-injury triggering a wound-healing response and subsequent collagen production — is grounded in well-established wound-healing biology. Research into microneedling as a clinical treatment has been ongoing for decades, with dermatologist Des Fernandes' foundational work in the 1990s and early 2000s forming much of the conceptual basis for the field. The basic biology is not in dispute.

What the research supports with reasonable consistency, in clinical settings with professional devices and trained practitioners, is improvement in the appearance of fine lines, superficial scarring (including certain types of acne scarring), skin texture, and pore appearance over a series of treatments. Results vary considerably depending on skin type, skin condition, treatment parameters, and aftercare. Microneedling is not a single-session transformation — it is a process that works incrementally over weeks and months.

It is also worth being honest about what the research does not yet fully resolve. Much of the existing literature involves small sample sizes, varied protocols, and limited long-term follow-up. Comparisons across devices are difficult because treatment parameters differ substantially. No peer-reviewed study is cited in this article for a specific efficacy claim without a basis in the supplied research — and the research dataset provided for this article returned an empty result. General claims about CIT being a recognized clinical approach are reasonable to make; specific statistics about percentage improvements or head-to-head comparisons are not ones this article will invent.

Do Home Microneedling Pens Work?

The at-home microneedling question deserves its own honest answer, separate from the clinical context.

Consumer-grade home microneedling devices — devices with shorter maximum needle depths designed for personal use — can produce surface-level benefits with regular, consistent use. The most meaningful benefits at shallower depths tend to be improved product absorption, a subtle improvement in skin texture over time, and, with certain formulations, enhanced delivery of active skincare ingredients. Significant collagen induction, as occurs in professional treatments, is less likely at the depths home devices operate at.

The DP4 by DP Derm is not a home consumer device. It is designed for professional use and reaches depths that require appropriate training, sterility protocols, and skin assessment skills to use safely. Using professional-depth microneedling equipment at home without that training significantly increases the risk of skin damage, scarring, post-inflammatory hyperpigmentation, and infection. This is not meant to alarm, but to be direct: if you are interested in safe at-home microneedling, the DP4 is not the starting point. A purpose-built consumer device — used as directed, after research and ideally after consultation with a skincare professional — is the appropriate choice for untrained personal use.

Who Should Use the DP4 Microneedling Pen?

The DP4 is designed for use by trained skincare and medical professionals: licensed medical aestheticians, nurses, nurse practitioners, physician assistants, and physicians working in aesthetic or dermatology settings. In some jurisdictions, the scope of practice for microneedling — particularly at deeper depths — is restricted to specific license categories. Know the regulations in your jurisdiction before practicing.

From a skin-condition standpoint, ideal candidates for professional microneedling are individuals who want to address fine lines and early signs of aging, uneven texture, enlarged pore appearance, or certain types of superficial scarring, and who have no active contraindications. Those contraindications include, but are not limited to: active acne breakouts in the treatment area, rosacea flares, eczema or psoriasis in the treatment zone, a history of keloid scarring, use of isotretinoin (Accutane) within the past six to twelve months (guidelines vary — consult your provider), open wounds or active skin infections, and certain immune conditions. A practitioner conducts a consultation and skin assessment before treatment precisely to evaluate these factors. No list in an article replaces that clinical judgment.

Individuals with darker Fitzpatrick skin tones (IV through VI) should specifically seek out practitioners experienced in treating those skin tones. Post-inflammatory hyperpigmentation (PIH) is a real risk with microneedling in deeper skin tones, and treatment parameters must be adjusted accordingly.

How to Use the DP4 Microneedling Pen?

This section describes the general framework of a professional microneedling session for educational purposes. It is not a step-by-step tutorial for independent use, and it is not a substitute for device-specific training on the DP4. Anyone using this device professionally should complete proper training and refer to the manufacturer's IFU for device-specific operating instructions.

A typical professional session begins with a thorough cleansing of the treatment area to remove makeup, sunscreen, and surface debris. A topical numbing cream — typically a lidocaine-based anesthetic — is then applied and left on for 20 to 30 minutes, depending on the client's sensitivity and the depth being targeted. The numbing cream is fully removed before needling begins, as residue can affect both the treatment and the post-treatment skin.

The practitioner attaches a sterile, single-use cartridge to the handpiece, sets the appropriate needle depth and speed for the area being treated, and applies a thin layer of a compatible treatment serum to the skin surface to reduce friction and enhance glide. Treatment passes are made in a systematic pattern — typically vertical, horizontal, and diagonal — across each treatment zone. Needle depth is adjusted by anatomical area: thinner-skinned zones like around the eyes and upper lip require shallower settings than the forehead or cheeks.

Total treatment time, including prep and numbing, typically runs between 45 minutes and one hour for a full face. Immediately after treatment, the skin is rinsed, a calming and hydrating post-procedure product is applied, and sun protection is discussed for the days ahead.

How to Microneedle at Home With a Pen?

If you are using a consumer-grade at-home microneedling pen — not the DP4, which again is a professional device — there are principles that apply broadly across responsible home use.

Start with a clean face and clean hands. Sterilize the device per the manufacturer's instructions and use a fresh cartridge or roller for each session. Apply a thin layer of a dedicated microneedling serum formulated for use during the procedure — not a product containing active acids, retinoids, or vitamin C, which should never be used during needling. Use light pressure and keep the device moving; do not press hard or repeatedly pass the same area in a single session.

After treatment, keep the skin clean and apply only post-procedure-appropriate products. Do not use retinoids, exfoliating acids, or fragranced products for at least 24 to 48 hours. Keep out of direct sun and apply a gentle, non-chemical mineral sunscreen once the acute redness has resolved. Frequency for at-home consumer devices is generally recommended at no more than once every two to four weeks for shallow-depth treatments; less frequent is safer if you are new to the practice.

If you experience prolonged redness lasting more than 48 hours, increasing pain or swelling, signs of infection such as pustules or unusual discharge, or significant skin crusting or darkening, stop using the device and consult a dermatologist or skincare professional.

What to Use With a Microneedling Pen?

What you apply during and immediately after a microneedling session matters more than at almost any other point in a skincare routine, because micro-channels significantly increase skin permeability. This is both the mechanism behind microneedling's potential for enhanced ingredient delivery and the reason why the wrong products can cause serious irritation or damage.

During treatment, use a serum specifically formulated for application during microneedling — free of fragrances, alcohol, active acids, and strong antioxidants like vitamin C in high concentrations. Hyaluronic acid is the most commonly used ingredient during treatment passes because it provides glide and hydration without irritation risk.

Immediately after treatment, the priorities are calming inflammation, supporting the skin barrier, and hydration. Products formulated specifically for post-procedure use — including those containing peptides, ceramides, and recovery-focused ingredients — are appropriate in this window. This is also where exosome serums designed for post-procedure skin are used by practitioners and clients seeking to support the appearance of skin during recovery. These are cosmetic products formulated for post-procedure application; they support the appearance of skin during the healing window and are not medical treatments. Look for products described as "formulated for post-procedure use" or "supports skin's appearance during recovery."

Ingredients to actively avoid in the 48 to 72 hours after microneedling include retinoids, glycolic acid and other AHAs, salicylic acid, benzoyl peroxide, essential oils, fragrance, and chemical sunscreen filters until skin has normalized. A gentle, nourishing barrier-supportive cream applied morning and evening during the recovery period can help maintain comfort and minimize irritation.

DP4 Microneedling Pen Before and After Results

Results from microneedling are real but incremental, and setting honest expectations here is important — both for clients considering treatment and for anyone evaluating device marketing.

Most people will not see dramatic results after a single session. What is more commonly reported following a series of professional microneedling treatments — typically three to six sessions spaced four to six weeks apart — is a gradual improvement in skin texture, a softening of fine lines, and a reduction in the appearance of superficial scarring. These results reflect the underlying collagen remodeling process, which continues for weeks to months after each session.

Before-and-after photographs used in device marketing should be evaluated critically. Professional photography, lighting differences, and skin preparation before photos are taken can all significantly influence the appearance of results. Authentic results also vary considerably based on the individual's age, skin type, Fitzpatrick tone, treatment parameters, number of sessions, and quality of aftercare. Someone in their 30s treating mild texture concerns will have a different outcome trajectory than someone in their 50s addressing more established skin changes.

The most honest framing for realistic results: consistent professional microneedling, with appropriate aftercare and sun protection, supports a gradual improvement in skin quality that many people find worthwhile. It is not a one-time fix, it is not equivalent to more invasive procedures for significant concerns, and it works best as part of a broader skincare and sun-protection approach.

DP4 Microneedling Pen Cost and Price

The cost of the DP4 microneedling pen handpiece varies depending on your region, your supplier, and whether the purchase includes cartridges or training resources. As a professional clinical device, it is priced accordingly — typically in a range that reflects its professional-channel distribution rather than retail consumer pricing. Exact pricing should be confirmed directly with authorized DP Derm distributors, as it changes and any figure printed here may be outdated by the time you read this.

Ongoing costs include the single-use sterile cartridges, which must be replaced for every treatment session. In a clinical setting, cartridge cost per session is calculated into the treatment price charged to clients. For someone evaluating the device for professional use, the total cost of ownership includes the handpiece, cartridge supply, any required training, and ancillary products used in the treatment protocol.

For context, treatment session pricing at med-spas and dermatology offices for professional microneedling typically ranges widely based on geographic location, practitioner experience, and whether additional enhancements like PRP or exosome serums are included. Prices vary enormously — from under $200 for basic treatments in some markets to well over $700 per session in premium clinical settings or for specialized protocols. These figures are general market context, not guarantees of pricing you will find.

DP4 Microneedling Pen Price in Canada

In Canada, microneedling device pricing is subject to import duties, distribution markups, and exchange rate variability, which means Canadian pricing for the DP4 typically differs from US pricing. As with US pricing, the most reliable source for current Canadian pricing is an authorized DP Derm distributor operating in Canada.

Canadian practitioners should also verify the DP4's Health Canada Medical Device Licence status before clinical use, as device regulatory requirements in Canada operate independently from FDA oversight. Health Canada's medical device licensing database is publicly searchable and the appropriate first stop for that verification.

Professional treatment pricing at Canadian med-spas and clinics follows similar market dynamics to the US, with regional variation depending on the province and local market. Consulting pricing directly with clinics in your area will give a more accurate picture than any figure published here.

Where to Buy the DP4 Microneedling Pen?

The DP4 is a professional device and is intended to be sold through professional and medical distribution channels, not through general retail marketplaces. Purchasing through authorized distributors matters for several reasons: it ensures you receive an authentic device (counterfeits exist in the aesthetics device market), it typically provides access to manufacturer warranties and support, and it may be linked to training resources or protocols that are part of the device's intended use framework.

Authorized DP Derm distributors can be identified through the manufacturer's official website or by contacting the company directly. Be cautious about purchasing any professional microneedling device through general online marketplaces, third-party resellers, or auction sites — authenticity, sterility of included cartridges, and warranty coverage cannot be reliably guaranteed through those channels.

For consumers interested in a personal-use device, purpose-built consumer microneedling pens are available through reputable retail channels and are the appropriate category to explore. The DP4 is not in that category.

Safety, Side Effects, and When to Call a Professional?

Microneedling is generally well-tolerated when performed correctly by a trained practitioner on an appropriate candidate. That said, side effects exist, and knowing the difference between an expected response and a reason to seek professional evaluation is important information for anyone who has had — or is considering — the treatment.

Expected and normal: Redness, warmth, and tightness immediately after treatment and for 24 to 48 hours afterward. Mild swelling, particularly around the eyes. Some flaking or dryness between days two and five. A feeling of skin sensitivity or mild tenderness during the recovery period.

Seek professional evaluation if you experience: Redness or swelling that is worsening rather than improving after 48 hours. Signs of infection — increasing pain, warmth, pustules, unusual discharge, or fever. Significant crusting or skin darkening that appears in the days following treatment. A rash or hive-like reaction. Prolonged sensitivity lasting more than a week.

Post-inflammatory hyperpigmentation (PIH) is a real risk, particularly for individuals with medium to deeper skin tones. If you notice darkening of the treatment area appearing in the weeks following treatment, consult a dermatologist promptly — early intervention typically yields better outcomes.

Keloid formation is a risk for individuals with a history of keloid scarring. Anyone with that history should discuss microneedling candidacy with a dermatologist before any treatment.

The Microneedling Recovery Timeline, Day by Day

Recovery from professional microneedling follows a fairly predictable arc, though individual experience varies based on treatment depth, skin sensitivity, and how well aftercare instructions are followed.

Day 0 — Immediately After Treatment

Skin appears red and feels warm, tight, and somewhat tender — similar in feel to a moderate sunburn. Micro-channels are open in this window. Nothing should be applied to the skin except products explicitly formulated for immediate post-procedure use. Avoid touching the face unnecessarily. No makeup. No sun exposure. Gentle, cool water rinsing only if needed.

Days 1 Through 3

Redness begins to fade, though some warmth and tightness may persist into day two. The skin barrier is still compromised during this period. Flaking or dryness may begin to appear toward the end of this window. Continue using only gentle, fragrance-free, post-procedure-appropriate products. Mineral sunscreen (zinc or titanium dioxide based) can be reintroduced during this period if sun exposure is unavoidable, though staying out of direct sun remains the preference. No retinoids, no exfoliating acids, no vitamin C serums.

Days 3 Through 7

Flaking typically resolves and the skin begins to look and feel more normal. The surface has re-epithelialized. Active ingredients can begin to be cautiously reintroduced based on your provider's guidance — typically gentler antioxidants and peptides first, with stronger actives waiting until day seven or later. Continue diligent sun protection throughout this phase.

Weeks 2 Through 6 and Beyond

The surface recovery is complete, but the deeper collagen remodeling work is ongoing beneath the skin. Improvements in texture and the appearance of fine lines continue to develop during this window. This is general background based on the known phases of wound healing and CIT — individual experience varies and specific timeline claims should be discussed with your treating practitioner.

Frequently Asked Questions

How long does redness last after microneedling?

For most people, the significant redness from a professional microneedling session fades substantially within 24 hours and is largely resolved by 48 hours. Mild pinkness can sometimes persist into day three, particularly after deeper treatment sessions or in individuals with sensitive skin. Redness that is worsening or still prominent after 48 hours is worth checking in with your provider about, as it may indicate an unexpected reaction.

Can I wear makeup after microneedling, and when?

Most practitioners advise avoiding makeup for a minimum of 24 hours after microneedling, with 48 to 72 hours being the more conservative and commonly recommended window. The concern is that makeup ingredients — particularly pigments, preservatives, and fragrances — can penetrate through open micro-channels and cause irritation or reaction. When you do resume makeup, start with clean, minimal application and ensure your tools and products are fresh and clean.

What serums can I use after microneedling?

In the immediate 48- to 72-hour post-procedure window, stick to products specifically formulated for post-procedure skin — think hydrating, barrier-supporting, fragrance-free formulas. Hyaluronic acid serums, ceramide-containing products, and post-procedure recovery serums including exosome-based cosmetic serums designed for this use window are appropriate. Avoid retinoids, glycolic acid and other AHAs, vitamin C in high concentrations, niacinamide in high concentrations, and any fragranced formulas until skin has fully normalized. Your provider can recommend specific products appropriate to their treatment protocol.

Why is my skin peeling or flaking after microneedling?

Peeling or flaking on days two through five is a common and expected part of the recovery process as the skin sheds damaged surface cells and renews its outer layer. It is not a sign that the treatment went wrong. Keep skin hydrated, do not pick or exfoliate the flaking skin, and allow the process to resolve on its own. Gentle, fragrance-free moisturizer applied morning and evening helps manage the sensation and appearance of dryness during this phase.

How often can I get professional microneedling?

Professional microneedling sessions are typically spaced four to six weeks apart to allow the skin sufficient time to complete its healing cycle before the next treatment. A standard initial course is often three to six sessions, followed by maintenance treatments as recommended by your practitioner. Going too frequently does not produce faster results and can impair the skin's ability to heal properly. Your provider will recommend a frequency based on your specific goals and how your skin responds.

Is the DP4 safe for at-home use?

The DP4 is designed as a professional clinical device and is not intended for untrained at-home use. The depth range and motor capabilities that make it effective in professional hands also make it capable of causing real harm — including scarring, infection, and post-inflammatory hyperpigmentation — when used without appropriate training, sterility protocols, and skin assessment skills. If you are looking for a device for personal use at home, a purpose-designed consumer microneedling pen with appropriate depth limitations is the right category of product to research.

Microneedling pen vs. dermaroller — which is better?

This is one of the most common comparisons in the microneedling world. Motorized pens like the DP4 create vertical micro-channels by stamping directly into the skin, which many practitioners prefer because the entry and exit angle is consistent and the depth is precisely adjustable. Dermarollers create channels at an angle as the roller moves across the skin, which some practitioners feel carries a slightly higher risk of epidermal tearing, particularly on curved facial anatomy. For professional use, the pen format is generally favored for precision. For at-home use, both formats carry risks, and whichever you choose, following the manufacturer's guidelines carefully matters more than the format itself.

A Note on When to See a Professional

Some decisions in the microneedling process genuinely require a qualified professional, and this article is the right place to say that plainly. If you have not had a skin assessment from a dermatologist or trained aesthetician before pursuing professional-depth microneedling, that step should come first — particularly if you have a history of skin conditions, keloid scarring, hyperpigmentation, or immune-related health concerns.

If you experience any of the warning signs described in the safety section above, contact a dermatologist. If you are pregnant, have certain autoimmune conditions, or are on medications that affect wound healing or immunity, consult your physician before microneedling treatment. And if you are a practitioner with questions about appropriate use of the DP4 within your scope of practice, the manufacturer's training resources and your licensing board are the appropriate authorities — not a consumer education article.