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Dermapen is a medically evidence-based treatment for acne scars (especially atrophic craters, hyperpigmentation, and erythema) that leverages the wound healing response, with improvement generally expected after 3 to 6 sessions. However, the required needle depth, number of sessions, and combination treatments differ depending on the type of acne scar (ice-pick, boxcar, rolling, erythema, or hyperpigmentation), and it is important to note that results are difficult to perceive after only one session. In this article, a Men’s Care Clinic physician explains, on an evidence basis, whether Dermapen (Dermapen 4) truly works for acne scars, and provides a thorough breakdown of the number of sessions and needle depths to maximize results, comparisons with Potenza and Fractional CO2 laser, before-and-after cases, and key points for improving male-skin specific shaving irritation and atrophic crater scars.

Table of Contents
Many men who have heard that “Dermapen works for acne scars” and are considering treatment still wonder, “Does it really work?”, “How many sessions do I need?”, and “How is it different from other laser treatments?” On social media and blogs you can find testimonials saying “Dermapen erased my acne scars,” but also voices saying “It did not work” or “It got worse,” so it is natural to feel uncertain.
To get straight to the point, Dermapen (especially the regulatory-approved Dermapen 4) is a scientifically evidence-based medical device for acne scars (atrophic craters, hyperpigmentation, erythema, and enlarged pores). International peer-reviewed dermatology journals (Dermatologic Surgery, Journal of Cosmetic Dermatology, etc.) have reported the efficacy of microneedling therapy, with improvement equivalent to or greater than fractional laser.
However, noticeable results require 3 to 6 sessions of continued treatment (up to 10 for deep craters), and the most common failure pattern is misjudging it as “ineffective” after only 1 or 2 sessions. In addition, the type of acne scar (ice-pick, boxcar, rolling, erythema, hyperpigmentation) determines the appropriate needle depth and combination treatments.
In this article, a Men’s Care Clinic physician with extensive experience performing Dermapen treatment provides a thorough, evidence-based, and clinically grounded explanation of how Dermapen works on acne scars, the number of sessions needed, before-and-after cases, comparisons with other treatments, and key points for improving male-specific shaving irritation and atrophic crater scars.


Dermapen is a medical device with recognized, evidence-based improvement for acne scars (especially atrophic craters, hyperpigmentation, erythema, and pores). The regulatory-approved Dermapen 4 uses ultra-fine microneedles (0.2 to 3.0 mm) to create microscopic perforations in the skin, and through the wound healing response, it remodels collagen and elastin in the dermis, flattening uneven acne scars.
A systematic review (2017) published in the U.S. dermatology journal Dermatologic Surgery reported that microneedling therapy provides equal or greater improvement of acne scars compared with fractional laser, with a lower risk of hyperpigmentation. Journal of Cosmetic Dermatology (2020) confirmed that production of type I and type III collagen peaks 4 weeks after treatment, supporting the evidence base for clinical efficacy.
That said, individual perception of results varies, and “dramatic improvement in a single session” is medically impossible. Collagen remodeling requires a minimum of 4 to 6 weeks, and deep ice-pick type acne scars may require 5 to 10 continued sessions. This lack of awareness is the biggest reason for the misconception that “Dermapen does not work.”
On the other hand, active acne (red, inflamed pustules and papules) and those with a keloid-prone constitution are not candidates, and the physician will determine eligibility during the pre-treatment consultation.
The name “Dermapen” is originally the product name of Dermapen 4, a medical device developed by Equipmed of Australia. It is also approved as a medical device under Japan’s Pharmaceuticals and Medical Devices Act, and may only be used by physicians and nurses.
On the other hand, home-use microneedles sold online (referred to as “dermarollers” or “self-Dermapens”) are consumer goods that have not been approved as medical devices, and are entirely different in the following respects.
| Comparison Item | Medical Dermapen 4 | Self / Home Devices |
|---|---|---|
| Needle precision | Medical-grade stainless steel, single-use sterile | No quality assurance, reused |
| Needle depth control | Precise control from 0.2 to 3.0 mm | Fixed or inaccurate |
| Vibration frequency | 120 times per second (uniform) | Manual, non-uniform |
| Hygiene management | Sterile environment of a medical facility | Self-managed, infection risk |
| Operator | Physician or nurse | Yourself (no skill) |
| Outcome | Acne scar improvement, medical evidence | Risk of scarring, infection, hyperpigmentation |
Cases of “worsening acne scars” or “developing keloids” from self-Dermapen use have been warned about by the Japanese Dermatological Association. Never use home devices for the purpose of treating acne scars.


The reason Dermapen works on acne scars is the physiological mechanism of the skin’s inherent “wound healing response”. When needles reach the dermal layer, the skin activates fibroblasts to “repair the damage,” producing new collagen, elastin, and hyaluronic acid. This is the principle that softens and flattens hardened scar tissue (acne scars).
Acne scars (particularly craters) are a state in which inflamed dermal tissue has scarred and become depressed. Surface skincare and chemical peels cannot reach the depth at which the tissue has been damaged, which is why Dermapen, which can directly address the dermal layer, is effective.
Because completion of these three stages requires at least 4 to 6 weeks, the standard protocol is to space sessions 1 to 2 months apart. The peak in perceived results comes 3 to 6 months after the first session. “No immediate change” is a normal physiological reaction, so there is no need to be impatient.
Dermapen 4 allows needle depth adjustment in 0.1 mm increments from 0.2 to 3.0 mm. The following are guidelines for acne scar treatment.
| Acne Scar Type | Recommended Needle Depth | Purpose |
|---|---|---|
| Erythema (post-inflammatory) | 0.5 to 1.0 mm | Improvement of vessels and inflammation in the superficial dermis |
| Hyperpigmentation (PIH) | 0.5 to 1.0 mm | Promotion of epidermal turnover plus drug delivery |
| Shallow boxcar | 1.0 to 1.5 mm | Remodeling of scars in the superficial dermis |
| Rolling | 1.5 to 2.0 mm | Subcision of fibrous bundles in the deep dermis plus reconstruction |
| Deep ice-pick | 2.0 to 2.5 mm | Disruption of scar fibers plus large-scale collagen production |
| Pores (including shaving irritation) | 0.5 to 1.0 mm | Tightening of the superficial dermis |
If the needle is too shallow it does not reach the dermis and produces no effect; if too deep, downtime and the risk of hyperpigmentation increase. Having a physician or nurse evaluate the symptoms and select the optimal depth is directly tied to balancing efficacy and safety.


Acne scars are classified by appearance and cause into three types: “erythematous,” “hyperpigmented,” and “atrophic crater”, with crater types further subdivided into ice-pick, boxcar, and rolling. Because Dermapen’s effectiveness varies by type, understanding which type your acne scars belong to is the first step in building a treatment plan.
At Men’s Care Clinic, the physician examines your skin condition during the consultation and optimizes needle depth, number of sessions, and combination agents according to type.
The type in which only redness remains after acne has healed. Caused by intradermal inflammation and capillary dilation; in men, it commonly appears on the cheeks, jaw, and around the nose where sebum production is high.
Erythema also fades naturally over several months to a year, but proactive intervention with Dermapen significantly shortens the improvement period.
The type in which inflammation stimulates intradermal melanocytes, leaving brown to black spot-like deposits. Common in Asians (Fitzpatrick Type III to IV), and in men it tends to darken when combined with sun exposure.
For hyperpigmentation, combination with agents (tranexamic acid, vitamin C) via mesoporation is recommended over Dermapen alone. The next chapter explains combination treatments in detail.
The type that is the most difficult to improve in acne scar treatment, but where Dermapen demonstrates the greatest power. Dermal scar tissue is depressed, appearing as “uneven” or “bumpy” on the surface. They are classified into three forms by shape.
| Type | Characteristics | Dermapen Effectiveness | Estimated Sessions |
|---|---|---|---|
| Ice-pick | Deep, pointed depressions less than 2 mm wide. Most refractory | Moderate to high (TCA CROSS combination recommended) | 6 to 10 |
| Boxcar | Wide depressions with sharp edges | High (most likely to respond) | 4 to 6 |
| Rolling | Shallow, wave-like depressions | High (subcision is effective) | 4 to 6 |
In particular, shallow rolling and boxcar craters are first-line indications for Dermapen. For deep ice-pick types, consider Dermapen plus TCA CROSS (focal high-concentration TCA application), or transition to Potenza (radiofrequency plus microneedle).
Men have more active sebum secretion than women, with a tendency for prominent pores on the cheeks, nose, and forehead. In addition, chronic skin irritation from shaving tends to cause redness, ingrown hairs, and clogged pores around the mouth, jaw, and neck.
At Men’s Care Clinic, many patients receive Dermapen in combination with beard hair removal, and we accommodate combined treatment of “shaving-irritation redness + pores + old acne scars”.


“How many sessions do I need?” is the most common question for improving acne scars with Dermapen. As a conclusion, 3 to 5 sessions for erythema and hyperpigmentation, 4 to 6 for boxcar and rolling craters, and 6 to 10 for deep ice-pick types are the guidelines, and it is a treatment for which results are difficult to perceive after just 1 or 2 sessions.
This chapter explains in detail the specific number of sessions by acne scar type, the before-and-after changes in the skin at each treatment milestone (session 1, 3, 5, and final), and the points that maximize results.
| Symptom | Sessions Needed | Treatment Interval | Total Treatment Period |
|---|---|---|---|
| Erythema | 3 to 5 | 1 month | 3 to 5 months |
| Hyperpigmentation (PIH) | 4 to 6 | 4 to 6 weeks | 4 to 8 months |
| Enlarged pores | 4 to 6 | 1 month | 4 to 6 months |
| Boxcar craters | 4 to 6 | 1 to 2 months | 4 to 12 months |
| Rolling craters | 4 to 6 | 1 to 2 months | 4 to 12 months |
| Ice-pick craters | 6 to 10 | 1 to 2 months | 6 to 20 months |
| Shaving-irritation, chronic redness | 3 to 5 | 1 month | 3 to 5 months |
This is not a one-and-done treatment. In actual clinical experience, although many people perceive “skin firmness and radiance” after the first session, perceiving improvement in crater depressions typically begins from the third or fourth session.
Note that collagen remodeling continues for 3 to 6 months after the final session. With a 6-session plan, the “final result” is determined 7 to 12 months later.
Whether or not you uphold these five points can greatly change the final outcome of the same six sessions.


Beyond Dermapen, options for acne scar treatment include Potenza (RF microneedle), Fractional CO2 laser, chemical peeling, and TCA CROSS. Because each has a different mechanism and excels with different acne scar types, choosing the optimal treatment for your symptoms is crucial.
This chapter clarifies which patients are best suited for Dermapen through comparisons with the four major treatments.
| Treatment | Mechanism | Best for | Downtime | Cost per session | Pain |
|---|---|---|---|---|---|
| Dermapen 4 | Physical perforation + wound healing | All craters, erythema, hyperpigmentation, pores | 3 to 7 days | 15,000 to 40,000 yen | Moderate (reduced by anesthesia) |
| Potenza | Needle + radiofrequency (RF) | Deep craters, deep dermis | 3 to 7 days | 50,000 to 100,000 yen | Moderate to strong |
| Fractional CO2 laser | Thermal perforation + tissue ablation | Deep craters, scars | 7 to 14 days | 30,000 to 80,000 yen | Strong |
| Chemical peeling | Chemical exfoliation | Mild hyperpigmentation, erythema, mild acne scars | 0 to 2 days | 6,000 to 15,000 yen | Mild |
| TCA CROSS | Focal high-concentration TCA application | Specialized for ice-pick | 3 to 7 days | From 3,000 yen per spot | Moderate |
As shown in the comparison above, Dermapen 4 is overall a superior option in terms of cost-effectiveness, short downtime, versatility, and low risk of hyperpigmentation.
“Which is better, Dermapen or Potenza?” is the most common comparison question. The differences between the two are as follows.
For mild to moderate acne scars, pores, and erythema, Dermapen 4 alone provides sufficient improvement. The cost is one-half to one-third, and downtime and pain are milder. On the other hand, those with deep depressed craters or who feel they have hit a plateau after multiple Dermapen sessions may consider transitioning to Potenza.
At Men’s Care Clinic, we recommend a stepwise approach: first treat with 4 to 6 Dermapen 4 sessions and then consider additional treatment for any remaining deep craters.
Fractional CO2 laser is also effective for deep acne scars, but compared with Dermapen it has the following characteristics.
For working male professionals who cannot take time off, those with darker skin, and patients seeking continued treatment, Dermapen 4 is the first choice; for those who can take a long break and want to see major change in 1 or 2 sessions, CO2 laser is also an option.


Dermapen is a highly safe treatment, but because it is a medical procedure, correctly understanding the downtime, side effects, and precautions leads to a more satisfying treatment. Cases of regret stem largely from receiving treatment without sufficient prior understanding, which accounts for many of the “you should not do it” remarks on social media.
At Men’s Care Clinic, we always explain the following points during the pre-treatment consultation and proceed only after you have understood and agreed.
Avoid treatment in the week before important events (weddings, business meetings, photo shoots). It is important to align the physician-recommended treatment interval (4 to 6 weeks) with your life events.
| Side Effect | Frequency | How to Handle |
|---|---|---|
| Redness and swelling | Almost everyone | Usually resolves spontaneously in 3 to 7 days. Cooling and moisturizing |
| Pinpoint bleeding | High frequency | Disappears in 1 to 2 days. Leave it alone |
| Scabs and peeling | Moderate frequency | Wait for natural detachment. Do not pick |
| Post-inflammatory hyperpigmentation (PIH) | 1 to 10% | UV protection plus tranexamic acid and hydroquinone |
| Temporary worsening of acne | Low frequency | Calm active acne in advance to prevent |
| Infection | Very low frequency | Prevented with single-use needles and hygiene management |
| Keloid formation | Constitution-dependent, low frequency | Those with keloid-prone skin should avoid treatment |
Even if you fall into these categories, please consult during the consultation, and we can propose alternative treatments (chemical peeling, oral tranexamic acid, vitamin C delivery, etc.).


Dermapen alone is sufficiently effective, but choosing a “combination treatment” matched to the symptom can significantly improve the speed of improvement and the final result. This leverages the “mesoporation” effect, which delivers agents directly to the dermal layer through the needle holes created by Dermapen.
At Men’s Care Clinic, we propose the following combination treatments based on your acne scar type, skin quality, and goals.
A premium course in which BioRePeelCl3 (a bioactive peel) or a sheet mask is applied immediately after Dermapen treatment for absorption. It simultaneously enhances skin smoothness and brightness.
Tranexamic acid preparations are delivered into the skin after Dermapen. Strongly supports improvement of post-inflammatory hyperpigmentation (PIH) and melasma.
For men whose primary concern is hyperpigmentation, this combination offers the best balance of cost and effectiveness.
After Dermapen, PRP (platelet-rich plasma), growth factor preparations, or exosomes are delivered into the skin. This maximizes activation of fibroblasts and enhances improvement of deep craters.
For deep, pointed ice-pick craters, the combination of Dermapen for overall treatment + TCA CROSS for individual treatment is the most powerful. TCA CROSS is a procedure that drips high-concentration TCA (trichloroacetic acid) directly into each ice-pick pore, remodeling scar tissue from the inside.
Ice-pick is the most refractory crater type, but many patients perceive clear improvement with this combination.


Men’s Care Clinic is an aesthetic medical clinic specializing in men with three branches in Shimbashi, Akihabara, and Omotesando, providing Dermapen treatment specialized for male-specific acne scars, pores, shaving irritation, and excess sebum.
The three distinguishing features of our clinic are “diagnosis by physicians who are deeply familiar with male skin,” “pay-per-visit (no course contract),” and “a safety framework backed by partnership with Toyosu Hospital (Showa University system)”.
Men’s Care Clinic adopts a pay-per-visit system with no contract obligations. You can continue at your own pace and cancel freely at any point.
| Menu | Price | Indications |
|---|---|---|
| Initial consultation | Free | Everyone |
| Dermapen 4 (full face) | From 19,800 yen | Trial pricing available for first visit |
| Dermapen 4 + Tranexamic Acid Delivery | From 29,800 yen | Strong hyperpigmentation or erythema |
| Velvet Skin | From 39,800 yen | Focus on pores, dullness, and skin quality |
| Dermapen 4 + Growth Factor | From 59,800 yen | For deep craters |
*Prices include tax. Pricing and menu may be revised. Please check the latest information on the Dermapen treatment page.
All branches provide the same quality of Dermapen treatment, and through our partnership with Toyosu Hospital (Showa University system), we maintain a safety framework capable of general-hospital-level response in the unlikely event of complications.


A physician answers, based on clinical experience, the questions about Dermapen for acne scars that are most frequently raised in Men’s Care Clinic consultations.
A. Yes, the regulatory-approved medical device Dermapen 4 has scientifically evidence-based improvement effects on acne scars (especially atrophic craters, hyperpigmentation, erythema, and pores). A systematic review in Dermatologic Surgery (2017) reports effectiveness equal to or greater than fractional laser. However, it requires 3 to 6 sessions of continued treatment rather than 1 or 2, and collagen remodeling requires a minimum of 4 to 6 weeks.
A. 3 to 5 sessions for erythema and hyperpigmentation, 4 to 6 for boxcar and rolling craters, and 6 to 10 for deep ice-pick types are the guidelines. The treatment interval is 4 to 6 weeks, and the total treatment period ranges from 3 months to over 1 year. Because collagen remodeling continues for 3 to 6 months after the final session, the final result is determined 6 months to 1 year after treatment ends.
A. It typically subsides naturally in 3 to 7 days. If the needle depth is shallow (around 0.5 mm), it takes 1 to 2 days; if deep (2.0 mm or more), 5 to 7 days. If redness lasts more than 10 days, swelling worsens, or pus appears, please consult the clinic. With aftercare such as cooling, moisturizing, and UV protection, recovery is faster.
A. If applied appropriately and performed at a medical institution, worsening is extremely rare. Most cases of worsening involve treatment performed during active acne, unqualified procedures with self-Dermapen or at esthetic salons, or neglected aftercare (UV protection, face washing). Please undergo treatment after receiving an indication assessment at consultation.
A. Yes. Dermapen is one of the first-line treatments for crater-type acne scars. Boxcar and rolling types respond particularly well, with clear improvement after 4 to 6 sessions. Deep ice-pick types are the most refractory, but improvement is possible with 6 to 10 sessions of Dermapen + TCA CROSS combination.
A. It depends on symptoms and budget. Dermapen 4 is the first choice for mild to moderate acne scars, pores, and erythema (cost-effectiveness balance), Potenza for deep depressions and refractory cases (powerful with RF), and CO2 laser for extensive deep craters when long downtime is feasible. At Men’s Care Clinic, we recommend a stepwise approach: first treat with Dermapen, then consider additional treatment for any remaining deep areas.
A. Avoid it absolutely. Home devices are not medical devices, and due to insufficient disinfection, inaccurate needle depth, and lack of operator skill, the risk of keloids, infection, deep scarring, and worsening hyperpigmentation is extremely high. The Japanese Dermatological Association has also issued warnings. Receiving medical-grade Dermapen 4 under the supervision of a physician or nurse is the only safe and effective method.
A. Be thorough with the following for 4 weeks after treatment: SPF 30+ sunscreen daily, oral tranexamic acid and topical hydroquinone, oral vitamin C (1500 mg/day), do not rub the skin, and quit smoking and get adequate sleep. In particular, men with darker skin (Fitzpatrick Type IV or higher) or who tan easily benefit from establishing a sunscreen habit before treatment to enhance prevention.
A. Pregnant or breastfeeding patients; those with keloid-prone skin or a history of hypertrophic scarring; those with active acne, herpes, or eczema; those with metal allergies; those with bleeding disorders or taking anticoagulants; those right after strong sunburn; those with collagen disease or autoimmune disease; and those taking isotretinoin or within 6 months of discontinuation. Even if you fall into these categories, we can propose alternative treatments such as chemical peeling, oral tranexamic acid, or vitamin C delivery, so please consult during the appointment.
A. It varies by symptom, but the guidelines are 0.5 to 1.0 mm for erythema, pores, and hyperpigmentation; 1.0 to 2.0 mm for boxcar and rolling craters; and 2.0 to 2.5 mm for deep ice-pick types. If the needle is too shallow there is no effect; if too deep, downtime and the risk of hyperpigmentation increase. The physician or nurse selects the optimal depth based on examination of the symptoms.
A. Yes, Dermapen is also effective on acne scars in non-facial areas (back, upper arms, chest, buttocks). However, because body skin is thicker than facial skin, the needle depth is set slightly deeper (2.0 to 2.5 mm), and the number of sessions increases to 6 to 8. Back acne scars common in men are sometimes treated together with beard hair removal.
A. Most of the redness subsides in 3 to 7 days. A common schedule for working male professionals is treatment on Friday evening to Saturday and a return to normal work on Monday (with a mask). For workplaces where masks are not required, Wednesday or Thursday is ideal. If important business meetings, weddings, or photo shoots are coming up, please leave 1 to 2 weeks.
A. Velvet Skin is a procedure that combines BioRePeelCl3 or a dedicated sheet mask after Dermapen. It enhances improvement of skin firmness, radiance, and brightness beyond Dermapen alone, but the cost is 10,000 to 20,000 yen higher. If pores, dullness, and mild acne scars are the primary concerns, Velvet Skin is suitable; if deep craters are the focus, Dermapen + Growth Factor is more appropriate.


Dermapen (especially the regulatory-approved Dermapen 4) is a medical device with medically evidence-based improvement effects on acne scars (atrophic craters, hyperpigmentation, erythema, and pores). International peer-reviewed journals such as Dermatologic Surgery and Journal of Cosmetic Dermatology have also reported effectiveness equal to or greater than fractional laser, with a lower risk of hyperpigmentation.
Let us reaffirm the key points conveyed in this article.
At Men’s Care Clinic, through consultation with physicians who are deeply familiar with male skin, we propose the optimal treatment plan tailored to your acne scar type and lifestyle. With a pay-per-visit system, you can continue without burden, and our partnership with Toyosu Hospital (Showa University system) ensures a fully developed safety framework.
If you are a man thinking “I want to truly improve my acne scars with Dermapen,” please first consult during a free consultation. A physician will examine your skin and explain in concrete terms the number of treatments needed, the cost, and the expected results.
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