What are the common side effects of microneedling?
Redness, swelling and pain come first, and they are the expected result of a deliberate injury. A 2021 systematic review of 85 studies in Dermatologic Surgery found these were the commonest effects, together with dry skin or peeling, and that they last up to 7 days. It also lists swollen lymph nodes and irritant contact dermatitis, a rash from something touching the skin. DermNet NZ adds oozing during recovery, milia (small white cysts that can be removed) and an acne flare that is usually mild.
Most reviews conclude the procedure is relatively safe. The same reviews take the shorter list of persistent problems seriously, and so does this article.
Which side effects are serious or last?
Three are named as persistent in the 85-study review: post-inflammatory hyperpigmentation (a dark mark left after the skin heals), tram-track scarring (parallel lines left along the path of the device) and granulomatous reactions (lumps of immune cells around something the body treats as foreign). Infection is rare, and DermNet names bacteria and the herpes simplex virus, the cause of cold sores.
The causes are not settled. One group of authors linked tram-track scars to too much pressure over bone, and another linked them to nickel allergy to the device. Both statements appear in the 2021 review by Gowda and colleagues, which is a reminder that these are reports and hypotheses, not measured rates.
Who should avoid microneedling, or wait?
No single list settles this, and a doctor should make the decision after looking at the skin. The reviews do point to groups for whom the risk is higher or the evidence is thin.
Active infection. The Gowda review calls active infection a contraindication, and the Chu review names it as a risk factor. A cold sore, an infected spot or a viral lesion in the area is a reason to wait. DermNet lists herpes simplex among the possible complications.
Metal allergy. Chu names metal allergy as a risk factor, and Gowda notes that devices may contain nickel and cause contact allergy.
Keloid or thick scarring tendency. Most trials in the Gowda review excluded people with a personal or family history of keloid or hypertrophic scars, so the risk of severe scarring in them is hard to judge. Keloid-prone skin and procedures explains how that tendency is assessed.
Bleeding disorders or anticoagulant treatment. Most trials excluded them as well. The review found no excess bleeding as a side effect, so the point is a gap in the evidence, not a recorded harm.
Recent sun exposure. Gowda advises avoiding treatment in people with obvious signs of sun exposure, to reduce the risk of dark marks.
Acne in flare. An acne flare is a listed side effect, so active, inflamed acne deserves a discussion first.
Does darker skin change the risk?
It does, and for most Malaysian readers it is the question that matters. Chu lists darker skin as a risk factor. Gowda calls post-inflammatory hyperpigmentation a justifiable concern in darker skin and a realistic side effect, while noting that many studies reported no pigment change, and that where it occurred it often settled by itself or with topical treatment.
Gowda adds that it is difficult to draw definite conclusions. Why dark marks linger longer in Malaysian skin describes the same tendency after acne.
What should happen after microneedling?
DermNet describes dryness, scaling, redness and swelling after treatment, cleansing the face with a gentle cleanser before bed, and sun protection for several weeks. The reviews give the expected effects a window of up to 7 days.
That window is the useful part. Effects that carry on beyond it, or get worse instead of settling, deserve a doctor's look, and so do oozing that does not stop, a spreading blister or sore (DermNet lists herpes simplex), a lump that forms, or darkening that deepens. Redness after a treatment: normal, or not? sets out how normal healing looks and which signs need review. Do not apply a serum or oil to the fresh puncture marks to speed things up. That is where the next section starts.
Why is a home dermaroller different from a doctor-run device?
The needle is only part of the difference. The risks reported in the literature cluster around what goes into the skin and what is done before it.
Products are the first. Applying a product before needling can introduce particles into the dermis. A 2014 JAMA Dermatology report describes three women with facial granulomas after microneedling, two of them with positive patch tests to the product used, and its authors point out that the system is available for home use. A 2025 case report in Cutis describes a 44-year-old woman who developed a necrotic ulcer on the chin after using vitamin E oil with an at-home device. A single report gives no rate. It does show how the harm happens.
Infection control is the second. The Gowda review found only two infections, both with radiofrequency devices, and one involved a woman who used a device at home on acne-like eruptions on her chest and face and spread varicella to her face. The authors describe the danger of self-administered treatment and the chance of self-inoculation. They also note that infection control in the studies was inconsistent, so even the clinical record is imperfect.
Examination is the third. Nobody checks a home user for an active infection, metal allergy, scarring tendency or recent sun before the first pass. DermNet describes home models with short 0.2 mm needles, and the reports above show what happens when the rules around them slip. Home HIFU, radiofrequency and LED tools raise a similar set of questions in the article on at-home devices.
What do the reviews not tell us?
They draw on published studies and case reports, and they say little about home rollers, which is why the home section above rests on case reports. The studies used different devices and skin types, and many excluded people with the conditions listed earlier. Nothing here is a rate you can apply to yourself.
Does this clinic offer microneedling?
No. For clarity, this clinic does not offer microneedling, plain or with radiofrequency. Why this clinic does not offer RF microneedling gives Dr Ong's reason for the radiofrequency version, and the explainer on what microneedling does and where the evidence stops covers the benefits side. This article is here so that anyone who has had it, or is deciding, can check what is expected and what is not.
The needle is simple. Knowing the person it is going into is the difficult part.
Common questions
What are the side effects of microneedling?
The commonest are redness, swelling, pain and dry skin, lasting up to 7 days in a review of 85 studies. Less often, lasting dark marks, tram-track scarring, granulomas, milia, an acne flare, or infection, including herpes simplex (cold sores), are reported.
Who should avoid microneedling?
The reviews name active infection, metal allergy, darker skin and products not made for use inside the skin as factors that raise the risk, and most trials excluded people with keloid tendencies, bleeding disorders or anticoagulant treatment, so their safety is less certain. A doctor decides after examining the skin.
Is a home dermaroller safe?
No review gives a safe-use rate for home rollers. Case reports describe a necrotic ulcer after vitamin E oil with an at-home device and varicella spread across the face after self-treatment, and a 2014 report notes the risk of products pushed into the skin.
Sources
- Chu S, Foulad DP, Atanaskova Mesinkovska N. Safety profile for microneedling: a systematic review. Dermatol Surg 2021;47:1249-1254. Read 12 November 2026 85 articles. The commonest adverse events are transient and last up to 7 days: redness, swelling, pain, post-inflammatory hyperpigmentation, dry skin or exfoliation, lymphadenopathy and irritant contact dermatitis. Persistent serious effects included post-inflammatory hyperpigmentation, tram-track scarring and granulomatous reactions. Factors that raise the risk: active infections, darker skin and metal allergies. Conclusion: relatively safe, with caution in active infection, darker skin types, metal allergies and with products not approved for intradermal use.
- Gowda A, Healey B, Ezaldein H, Merati M. A systematic review examining the potential adverse effects of microneedling. J Clin Aesthet Dermatol 2021;14:45-54. Full text read 12 November 2026 51 articles and 1,029 patients; relatively safe with minimal adverse effects overall. Active infections are a contraindication and many studies excluded them. Most studies excluded people with a personal or family history of keloid or hypertrophic scarring, and most excluded people with bleeding disorders or on anticoagulants. Metal devices may contain nickel and cause contact allergy. Acne flares are possible after treatment. Hyperpigmentation is a realistic side effect, particularly in darker skin, and in many reports it settled spontaneously or with topical treatment. Only two infections were identified, both with radiofrequency devices, one in a person who used a device at home, who spread varicella from the chest to the face. Infection control measures in the studies were inconsistent.
- Soltani-Arabshahi R, Wong JW, Duffy KL, Powell DL. Facial allergic granulomatous reaction and systemic hypersensitivity associated with microneedle therapy for skin rejuvenation. JAMA Dermatol 2014;150:68-72. Read 12 November 2026 Three women developed facial granulomas after microneedle therapy; applying topical products before needling can introduce immunogenic particles into the dermis and provoke local or systemic hypersensitivity; the authors note the system is accessible for home use.
- Huang C, Smoller BR, Kerstetter JC, Raza AS, Greas MR. Destructive facial granuloma following self-treatment with vitamin E oil and an at-home microneedling device. Cutis 2025;116:146-148. Read 12 November 2026 A single case report: a 44-year-old woman developed a necrotic ulcer on the chin after self-treatment with vitamin E oil and an at-home device. A case report gives no rate.
- DermNet NZ. Skin needling. Read 12 November 2026 Possible problems: oozing and swelling during recovery, bacterial infection (rare) or herpes simplex (cold sores), granulomatous reactions possibly due to implanted cosmeceuticals or nickel allergy, milia and a usually mild acne flare. Aftercare: dryness, scaling, redness and swelling may be seen; clean the face with a gentle cleanser before bed; sun protection for several weeks is recommended. Describes home models with short needles (0.2 mm depth).
