Teenage Acne: What Works, What Does Not, and When to See a Doctor
Acne affects the large majority of teenagers and a substantial number of adults. It is a medical condition with effective treatments, not a hygiene failure or a consequence of eating fried food, and treating it early prevents permanent scarring.
What causes it
Four things combine in the hair follicle:
- Excess sebum production, driven by androgens rising at puberty
- Abnormal shedding of cells lining the follicle, which blocks the pore
- Cutibacterium acnes, a normal skin bacterium that multiplies in the blocked follicle
- Inflammation, which produces the redness, pain and eventual scarring
This is why washing more does not fix it. The blockage is inside the follicle, not dirt on the surface.
Types of lesion
- Blackheads and whiteheads, comedones: blocked pores without inflammation. Blackheads are dark from oxidised pigment, not dirt
- Papules: small red bumps
- Pustules: with a visible white or yellow centre
- Nodules: deep, firm, painful lumps
- Cysts: deep, fluctuant and most likely to scar
Nodular and cystic acne needs prescription treatment early, because scarring is permanent and far harder to treat than the acne was.
Treatments with good evidence
Topical retinoids — adapalene, tretinoin. The foundation of treatment. They normalise shedding, unblock pores and prevent new lesions. Adapalene is available without prescription in many places.
How to use them properly, since most failures are technique:
- Apply a pea-sized amount for the whole face, not a dab on each spot. Acne is treated across the area, not lesion by lesion
- Use at night, on dry skin, 20 minutes after washing
- Start every second or third night and build to nightly
- Expect dryness, peeling and sometimes an initial worsening for two to four weeks. This is normal, not an allergy
- Use a non-comedogenic moisturiser and daily sunscreen
- Give it 12 weeks before judging. Most people stop at three
- Avoid in pregnancy
Benzoyl peroxide. Antibacterial, and crucially it prevents antibiotic resistance when combined with antibiotics. Start at 2.5 percent, which works as well as higher strengths with less irritation. It bleaches fabric, so use white towels and pillowcases.
Topical antibiotics such as clindamycin, always combined with benzoyl peroxide, never used alone, because resistance develops quickly.
Azelaic acid, useful for pigmentation after acne and safe in pregnancy.
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Salicylic acid, mild comedolytic effect.
Oral antibiotics such as doxycycline for moderate to severe inflammatory acne, used for a defined period of around three months alongside topical treatment, not indefinitely.
Hormonal treatment for women: combined oral contraceptives and spironolactone, particularly useful with jawline acne, premenstrual flares, or features suggesting PCOS.
Isotretinoin for severe, scarring or treatment-resistant acne. Highly effective, often curative. It requires specialist supervision, blood monitoring, and strict pregnancy prevention because it causes severe birth defects. Dryness of lips, skin and eyes is universal; mood should be monitored and any change reported.
What does not work
- Scrubbing and harsh cleansers, which damage the barrier and worsen inflammation
- Washing more than twice daily
- Toothpaste, lemon juice, baking soda, raw garlic, and most kitchen remedies, which cause irritant and chemical burns
- Alcohol-based astringents
- Most “oil-free deep cleansing” routines marketed to teenagers
- Avoiding moisturiser because skin is oily; dehydrated skin produces more oil and cannot tolerate retinoids
- Spot treatments alone, since acne forms days before it appears
- Expensive multi-step routines with many active ingredients at once, which mainly cause irritation
Diet
The evidence is modest but real. High glycaemic load diets, meaning lots of sugar, white bread, white rice and sweetened drinks, are associated with worse acne, and reducing them helps some people. Skimmed milk has a consistent association; cheese and yoghurt do not. Chocolate is weakly implicated, probably through sugar. Whey protein supplements commonly worsen acne in young men.
Oily food, fried snacks and chillies do not cause acne, despite near-universal belief.
Do not pick
Squeezing pushes inflammation deeper, prolongs healing, worsens pigmentation and directly causes scarring. The marks left behind are of two kinds: flat dark or red marks, which fade over months, and true scars, which are permanent and need procedures. Picking turns the first into the second.
Skincare that supports treatment
- Wash twice daily with a gentle non-soap cleanser, lukewarm water, fingertips not a scrub
- A light non-comedogenic moisturiser, which makes retinoids tolerable
- Daily sunscreen, essential because retinoids, doxycycline and benzoyl peroxide all increase sun sensitivity, and sun worsens post-acne pigmentation
- Clean pillowcases, clean phone screens, and avoid heavy pore-blocking hair oils on the forehead
- Remove makeup before bed and choose non-comedogenic products
See a doctor when
Acne is nodular or cystic, scarring is already appearing, there is significant pigmentation, over-the-counter treatment has failed after 12 weeks of correct use, acne is affecting mood or social life, there is sudden severe onset, or in girls there are signs suggesting PCOS such as irregular periods and excess hair growth.
The mental health part
Acne has measurable effects on self-esteem, anxiety and depression in adolescence. Dismissing it as something that will pass is not harmless advice. Effective treatment exists; a dermatology referral is reasonable long before the skin is severely affected.
This is general information. Isotretinoin, hormonal treatment and oral antibiotics require medical supervision, and persistent or scarring acne should be seen by a dermatologist.