Teen Acne: What’s Normal, What Works, and When to See a Doctor

Teen acne is extremely common and, for most teenagers, very treatable with inexpensive drugstore products used consistently for a couple of months. The two ingredients with the best evidence are benzoyl peroxide and a topical retinoid (over-the-counter adapalene). What matters most is starting early, being patient, and seeing a doctor promptly if spots are deep and painful, leaving scars, or getting your teen down.

How common is acne in teenagers?

So common that it’s closer to the rule than the exception. The American Academy of Dermatology (AAD) says acne usually begins in puberty and that about 85% of people aged 12 to 24 have at least minor acne. The NIH’s StatPearls review notes that estimates of acne in adolescents range from 35% to over 90% depending on the study, and that teenage acne is more common in boys than girls (after adolescence, it’s mostly women who are affected).

Why puberty? The AAD explains that rising androgen hormones enlarge the skin’s oil glands, which then make more oil (sebum). Excess oil and dead skin cells plug the pores, and the skin bacterium Cutibacterium acnes multiplies inside, causing inflammation, as HealthyChildren.org, the American Academy of Pediatrics’ parent site, describes. Family history matters too: the AAD says the risk is higher if a parent or close relative had severe acne that scarred.

What’s normal, and what isn’t?

A few blackheads, whiteheads and pimples on the forehead, nose and chin are a normal part of puberty. Many teens also get spots on the chest and back (see back acne). The types of spots are explained in types of acne.

What falls outside “normal, just use a drugstore wash”: deep, painful lumps (nodules or cysts), spots that leave pitted or raised scars, and acne that is clearly affecting mood or confidence. The UK’s NICE guideline uses a useful rule of thumb: 35 or more inflamed spots, or 3 or more nodules, counts as moderate to severe acne, which usually needs prescription treatment.

A few myths are worth clearing up. Acne isn’t caused by dirt, and HealthyChildren.org notes it cannot be scrubbed off. On food, the same page says the role of diet is unclear, though diets high in sugars and simple carbohydrates might contribute. More on that in diet and acne.

What OTC treatments actually work for teen acne?

Benzoyl peroxide

Benzoyl peroxide (BPO) gets a strong recommendation in the 2024 AAD acne guideline, which covers anyone aged 9 and older. It’s sold OTC at 2.5% to 10%. HealthyChildren.org suggests starting with a lower-strength (3.5% to 5%) wash once a day. An honest note on the evidence: a 2020 Cochrane review of 120 trials found BPO may work better than placebo, but rated that evidence low certainty, and irritation (redness, itching, burning) was a common reason people stopped. It also bleaches towels and pillowcases.

Adapalene (a retinoid)

Adapalene 0.1% gel (sold as Differin, among other brands) is available over the counter and labelled for ages 12 and up. Topical retinoids get a strong recommendation in the AAD guideline, and StatPearls lists them as first-line for mild acne because they prevent new clogged pores. The OTC label says to use it once daily in a thin layer on clean, dry skin, warns acne may seem to worsen in the early weeks, advises sunscreen, and says results can take up to 3 months. If pregnancy is possible, the label says to ask a doctor first. See how to start adapalene for a gentle ramp-up.

Salicylic acid

Salicylic acid (OTC 0.5% to 2%) is in many teen cleansers. It’s a reasonable option for blackheads and for teens who find BPO too irritating, but the evidence is weaker: the AAD guideline gives it only a conditional recommendation, and a 2020 Cochrane review rated its comparisons as low certainty.

A simple teen acne routine

1. Morning: gentle cleanser (or a BPO wash), then a non-comedogenic moisturiser and sunscreen. NICE suggests washing with a non-alkaline (pH-neutral or slightly acidic) cleanser twice a day and avoiding oil-based, pore-clogging products.
2. Evening: cleanse, let skin dry, then a pea-sized amount of adapalene. Start every other night if it stings.
3. Hands off. NICE notes that persistent picking or scratching can increase the risk of scarring.
4. Wait at least two months. HealthyChildren.org says acne takes at least two months to improve after starting treatment, and the AAD says full clearing can take three or four months.

A full product-by-product plan is in teen acne routine on a budget.

When do teens need prescription treatment?

If OTC products aren’t enough, a clinician has a lot more to offer, and none of it is a sign of failure. NICE’s first-line prescription options, each given as a 12-week course before review, are mostly combinations of the same ingredient families: fixed-dose adapalene with benzoyl peroxide, tretinoin with the antibiotic clindamycin, or benzoyl peroxide with clindamycin, with an oral antibiotic added for moderate to severe acne. The 2024 AAD guideline strongly recommends oral isotretinoin for severe acne, acne causing psychological distress or scarring, and acne that hasn’t responded to other treatments. Isotretinoin needs close medical supervision and strict pregnancy prevention, because the AAD notes it can cause serious birth defects, so it’s a detailed conversation for your teen and their doctor. Hormonal options such as some birth control pills get conditional recommendations for some patients.

How does acne affect teens emotionally?

More than many adults realise. A 2020 meta-analysis in the Journal of the American Academy of Dermatology pooled 42 studies and found acne was significantly associated with both depression and anxiety, although it noted inconsistent methods across studies and many without control groups. That’s an association, not proof that acne causes depression, but it’s consistent with what dermatologists see. The AAD notes that many studies show acne lowers self-esteem, that self-esteem rises when acne clears, and that the longer someone has acne, the more likely depression and anxiety become. NICE advises referral to a dermatologist when acne causes persistent psychological distress or a mental health disorder.

How can parents help?

• Take it seriously. “They’ll grow out of it” can mean years of distress and a higher risk of scarring; the AAD says deep acne and picking both raise that risk.
• Don’t nag. The AAD reports that when parents reminded teens every day to use their acne medicine, it backfired. Regular appointments work better, because people follow treatment more closely around appointment time.
• Watch for signs of depression, such as sadness lasting two weeks or longer, loss of interest in activities, or avoiding friends, as the AAD lists.
• Let your teen talk to the dermatologist alone for part of the visit; the AAD suggests this helps them build a relationship and share their real concerns.
• Keep it simple and cheap. Two or three products used every day beat a shelf full of products used sometimes.

Frequently asked questions