Is Microneedling Safe, and What Does It Actually Treat?

By Alisa Cedeño

Microneedling sits on nearly every medical spa menu, usually next to a short description about collagen and a photo of very smooth skin. The procedure itself is simple to describe: a device covered in fine needles makes many tiny punctures in the skin. What is harder to find on a treatment menu is which uses regulators have reviewed, what the published studies measured, and who is more likely to have a problem afterward. This article goes through those questions using the Food and Drug Administration's own guidance, a dermatologic surgery society's patient information, and three systematic reviews.

What is microneedling?

The FDA describes microneedling devices as instruments with many small needles, tips, or pins that are repeatedly inserted into and removed from the skin. The needles may sit on a roller, on a flat surface that is stamped onto the skin, or on the tip of a pen-shaped instrument. Some devices are manual. Others use a motor, and on some motorized devices the practitioner can adjust how deep and how fast the needles go.

The American Society for Dermatologic Surgery, in its patient page on microneedling, calls the procedure percutaneous collagen induction. The idea is that controlled punctures at a set depth trigger the skin's wound-healing response, which forms new collagen and elastin over time. The society describes a typical session as a 30-minute office visit with a topical anesthetic, using a glide agent on the skin, most commonly a hyaluronic acid gel.

What has the FDA actually authorized microneedling for?

The list is shorter than most treatment menus. According to the FDA, it has authorized microneedling devices to improve the appearance of facial acne scars, facial wrinkles, and abdominal scars in patients aged 22 or older. The agency adds that it has granted marketing authorization to only a limited number of devices, each for specific areas of the face and body, and that it may not have reviewed a given device for every location where it is being used.

Two details on that page are worth knowing before a consultation. First, the FDA states that microneedling devices are not approved for delivering cosmetics, topical medications, vitamin solutions, drugs, or blood products such as platelet-rich plasma into the skin. Those combinations are widely offered, but the agency says the risks of off-label uses and of combining the devices with other products are not known. Second, not every product sold as a microneedling tool is a medical device. Products that do not penetrate the living layers of the skin and claim only to exfoliate or give skin a smoother look generally fall outside the device rules, which also means they have not been through the same review.

What does the research say about acne scars and wrinkles?

For acne scars, the direction of the evidence is consistent, though the details are not. A systematic review published in Dermatologic Surgery in 2020 looked at 33 articles, from randomized trials down to case reports, and found that all of them reported improvement in the appearance of acne scars after microneedling. The same review found the evidence inconsistent when microneedling alone was compared with combination treatment or with fractional laser. In other words, the studies agree that scars looked better. They do not agree on how microneedling ranks against the alternatives.

For facial aging, a 2025 systematic review in Aesthetic Plastic Surgery pooled 21 articles covering 723 patients. Wrinkling was the most common endpoint. The pooled analysis found that 83 percent of patients reported being satisfied with their treatment. That figure deserves a careful reading. Satisfaction is a patient-reported measure, not a measurement of the skin, and the authors themselves noted that the lack of standardized outcome measures makes it hard to pin down how well microneedling treats signs of facial aging. Nineteen of the 21 trials also used multiple sessions on varying schedules, so the result does not describe a single visit.

That matches what the dermatologic surgery society tells patients: improvement in skin texture happens over time, and a series of monthly treatments, at least three, is typically required.

What are the common side effects, and how long do they last?

The FDA lists the common risks of authorized uses as dryness, rough skin, tightness, redness, itching, peeling, discomfort, burning, bruising, bleeding, and crusting. Less common risks include pigment changes in either direction, reactivation of herpes cold sores, swollen lymph nodes, and infection. The agency says most side effects occur shortly after treatment and resolve, but that some can last a long time and some may be permanent.

A 2021 systematic review of microneedling's safety profile in Dermatologic Surgery puts some structure on that list. Across 85 articles, the most commonly reported adverse events were expected post-procedure effects lasting up to seven days, such as redness, swelling, pain, and dry or flaking skin. The persistent, serious effects it identified were post-inflammatory hyperpigmentation, a pattern of scarring described as tram-track scarring, and granulomatous reactions. The authors concluded that microneedling is a relatively safe therapy and that most adverse events are minimal and resolve on their own.

The 2025 facial aging review reported low rates as well: temporary redness in 6.8 percent of patients, scaling in 1.7 percent, a burning sensation in 1.5 percent, and itching in 0.4 percent.

For downtime, the dermatologic surgery society's patient page says people usually have two to seven days of it, ranging from something that looks like a mild sunburn to peeling, and that makeup and sunscreen can be used after 24 hours.

Who should think twice before booking?

The FDA's list of people for whom the procedure may not be suitable is long, and it is the part of the guidance least likely to appear on a spa menu. It includes people with clotting or bleeding disorders, people taking blood thinners including low-dose aspirin, people who are immune suppressed, people with uncontrolled diabetes, and anyone with an active skin infection, an active facial rash, or a current cold sore outbreak. It also includes people with a history of keloid scars, people with eczema, psoriasis, or vitiligo, people who are pregnant or breastfeeding, and people who have taken isotretinoin in the past six months.

Skin tone is a point where the sources do not line up neatly. The dermatologic surgery society lists as an advantage that microneedling can be performed on patients of any skin color. The FDA, however, cautions that people with darker skin types face a risk of darkening or lightening after the procedure and notes that some authorized devices were not studied in subjects with darker skin. The 2021 safety review names darker skin, active infection, and metal allergy as the factors that raise the risk of adverse events. A reasonable reading is that darker skin does not rule the procedure out, but it is a reason to ask a provider directly about their experience and about pigment changes.

The society also notes that dermatologists generally prefer to treat acne scarring once the acne itself is under control, so people with active acne are usually asked to wait.

Is radiofrequency microneedling the same thing?

No, and the difference matters for safety. Radiofrequency, or RF, microneedling devices use the needles as small electrodes that deliver energy to heat tissue within and under the skin. On October 15, 2025, the FDA issued a safety communication about RF microneedling saying it is aware of reports of serious complications with certain uses, including burns, scarring, fat loss, disfigurement, and nerve damage, some of which needed surgical repair or other medical treatment.

The agency did not pull the devices from the market. It said its evaluation is ongoing and that it is working with manufacturers. Its advice to patients was to seek care from a licensed health care provider with training and experience on these specific devices, to ask which device will be used, and to understand that RF microneedling is a medical procedure, not a cosmetic treatment, and should not be done at home.

What should you ask a medical spa before a session?

The FDA's patient recommendations translate into a handful of plain questions. Ask about the provider's training and experience with microneedling. Ask how the device is cleaned between patients. Ask whether a new needle cartridge is used for every patient and every session; the FDA states that re-using a cartridge is unsafe even if it has been cleaned. Ask for the patient labeling that comes with FDA-authorized devices. Health care providers can confirm that a device is listed in the FDA's De Novo or 510(k) databases, and a clinic that uses an authorized device should be able to tell you its name.

It is also fair to ask what will be applied to your skin during and right after the session. The 2021 safety review specifically urges caution when microneedling is used together with products not approved for use inside the skin, and the dermatologic surgery society lists allergic response to topicals applied during or immediately after treatment among the less common side effects.

Frequently asked questions

• Is microneedling FDA approved? The FDA has authorized specific microneedling devices to improve the appearance of facial acne scars, facial wrinkles, and abdominal scars in patients aged 22 or older. Other uses, and many products on the market, have not been reviewed by the agency.
• How many microneedling sessions do most people need? The American Society for Dermatologic Surgery says a series of monthly treatments, at least three, is typically required. The FDA likewise tells patients they may need more than one procedure.
• How long does redness last after microneedling? A 2021 systematic review found the most common side effects, including redness and swelling, were transient and lasted up to seven days. The dermatologic surgery society describes two to seven days of downtime.
• Is microneedling with PRP or vitamin serums reviewed by the FDA? No. The FDA states that microneedling devices are not approved for delivering blood products such as platelet-rich plasma, vitamin solutions, drugs, or cosmetics into the skin.
• Is RF microneedling riskier than standard microneedling? The FDA has not compared the two directly, but in October 2025 it issued a safety communication about serious complications reported with certain uses of RF microneedling, including burns, scarring, and nerve damage.

This article is general information, not medical advice, and does not replace a consultation with a licensed provider.