Acne in Puberty: Causes and Treatment for Indian Teens

• Acne is caused by puberty hormones, not by being dirty, eating chocolate, or sweating. You did not do anything to cause it.
• Mild acne usually settles with a simple routine plus benzoyl peroxide or adapalene. Give any treatment 6 to 12 weeks before judging it.
• See a dermatologist early for moderate or severe acne. Painful nodules and cysts can scar permanently, and early treatment prevents that.
• Never pick or squeeze spots. In Indian skin tones this often leaves dark marks (post-inflammatory hyperpigmentation) that last months.
• Daily oil-free moisturiser and sunscreen are not optional. They protect your skin barrier and stop treatments from causing dryness and dark marks.
• Isotretinoin can clear severe acne for good but needs medical monitoring and, for girls, strict pregnancy prevention because it causes serious birth defects.

Puberty acne happens because of a chain of changes inside your skin, not because of anything you are doing wrong.

It starts with hormones. As androgens (testosterone in boys, plus testosterone and DHEA-S in girls) rise during puberty, the skin's oil glands grow larger and make more oil (sebum). These glands are concentrated on the face, chest, back, and shoulders, which is why spots appear there. Oil production peaks in the teen years and slowly settles in your twenties, which is why acne improves for most people with time.

Next, dead skin cells build up and become stickier inside the pore. Mixed with extra oil, they form a tiny plug called a microcomedone, the starting point of every spot. If the pore stays closed it becomes a whitehead; if it opens and the trapped material oxidises it turns dark and becomes a blackhead. The dark colour is oxidised pigment, not dirt.

Then a normal skin bacterium called Cutibacterium acnes (older name Propionibacterium acnes) multiplies in the blocked, oily pore and triggers inflammation. That inflammation produces the red, sore spots: papules, pustules, and in severe cases deep nodules and cysts.

Understanding this chain matters because every acne treatment targets one of these steps. It also explains the honest truth: acne is not caused by poor hygiene, by chocolate or fried food, or by sweating. It is biology, and biology is what treatment addresses.

Knowing what kind of spots you have helps you choose treatment and explain things clearly to a doctor.

Non-inflammatory spots (comedones):

• Whiteheads: small white or skin-coloured bumps where the pore is plugged but closed.
• Blackheads: open plugged pores that look dark because the contents have oxidised, not because they are dirty.

• Papules: small red, sometimes tender bumps with no visible pus.
• Pustules: the classic pimple, a red bump with a white pus tip.
• Nodules: larger, firm, painful lumps deeper in the skin.
• Cysts: deep, fluid-filled, often very painful lesions.

A rough sense of severity helps you decide whether to start at home or go straight to a dermatologist.

Mild acne: mostly blackheads and whiteheads with the occasional small spot, in limited areas, not painful, not scarring. A simple skincare routine plus an over-the-counter treatment for a few months is a reasonable first step.

Moderate acne: widespread blackheads and whiteheads plus red, inflamed spots across much of the face, sometimes the chest or back, perhaps a few dark marks or early scars, and enough to make you self-conscious. This benefits from a dermatologist and prescription treatment. Do not wait too long, because treating it well now prevents progression and scarring.

Severe acne: lots of inflamed spots including painful nodules or cysts, scarring or a clear risk of it, multiple body areas affected, and a real impact on mood and confidence. This needs a dermatologist promptly, usually for oral treatment such as isotretinoin. The months spent waiting are exactly when permanent scars form, so early care is the priority.

Where to get care in India. Dermatologists are widely available, from clinic chains to independent practices, typically at around 800 to 2,000 rupees per consultation. Government dermatology departments at major teaching hospitals such as AIIMS, PGIMER, and JIPMER offer care at very low or no cost. A full course of treatment for moderate to severe acne over 6 to 12 months, including consultations, medicines, and follow-up, usually costs around 5,000 to 25,000 rupees privately, and far less or nothing at government facilities.

A simple, consistent routine is the foundation under every other treatment, and on its own it is often enough for mild acne. You need four things: gentle cleansing, oil-free moisturiser, daily sunscreen, and avoiding habits that make acne worse.

Cleanse twice a day. Use a gentle cleanser made for acne-prone skin, morning and night, with lukewarm water (not hot, which dries the skin). Wash again after heavy sweating. Do not over-wash, scrub, or use rough brushes, because that damages the skin barrier and can actually make acne worse.

Moisturise, even if your skin is oily. This is the step teens skip most often, fearing it will make acne worse. The opposite is true. A light, oil-free, water-based moisturiser keeps the skin barrier healthy and prevents the rebound oiliness and irritation that dryness causes, which matters even more once you start retinoids. Choose a lotion, gel, or fluid rather than a thick cream.

Use sunscreen every morning. Pick a broad-spectrum SPF 30 or higher, ideally a matte, gel-based formula suited to humid Indian weather. Sunscreen is essential when using retinoids, which make skin more sun-sensitive, and it stops dark marks from getting darker. Reapply every 2 to 3 hours outdoors.

Avoid the things that worsen acne:

• Do not pick, squeeze, or pop spots. This is the biggest cause of scarring and dark marks.
• Avoid heavy, pore-clogging products on the face, including thick coconut or mustard oil and heavy cold creams.
• Keep hair oils off your forehead, change pillowcases weekly, wipe your phone screen, and try not to rest your face on your hands.

For mild acne, and as a starting point for moderate acne, a few well-proven ingredients available without prescription do most of the work. Avoid spending on expensive serums or multi-step regimens, and skip turmeric or sandalwood pastes that can stain and irritate.

Benzoyl peroxide kills acne bacteria, reduces inflammation, and helps unblock pores. Start with the 2.5 percent strength, which works as well as 5 percent with less irritation. Apply a pea-sized amount to affected areas at night, building up to twice daily as your skin tolerates it. Expect some dryness and peeling for the first 2 to 3 weeks. Note that it can bleach fabric, so use older or white towels and pillowcases and let it dry before lying down.

Salicylic acid is a gentle exfoliant that unblocks pores. It comes in face washes, toners, and spot treatments, is less drying than benzoyl peroxide, and suits skin that does not tolerate benzoyl peroxide well.

Adapalene 0.1 percent gel is a retinoid now available over the counter in India and is the most effective non-prescription ingredient, working for moderate as well as mild acne. Apply a pea-sized amount across the whole affected area (not just on spots) once at night. Expect dryness and peeling for the first few weeks, use moisturiser to manage it, wear sunscreen daily, and allow 8 to 12 weeks to see results. Do not apply adapalene and benzoyl peroxide at the same moment; use one at night and the other in the morning.

Niacinamide (vitamin B3) serums at 5 to 10 percent can help reduce oiliness, inflammation, and dark marks. Apply once in the morning under moisturiser and sunscreen.

For most teens, a simple combination of gentle cleanser, moisturiser, sunscreen, and benzoyl peroxide and/or adapalene used consistently for 8 to 12 weeks clears mild to moderate acne. If it does not, the next step is a dermatologist for prescription treatment.

When over-the-counter products are not enough, a dermatologist can prescribe stronger creams and gels, and can tailor the combination to your skin.

Topical retinoids are the most important prescription creams for acne. They include tretinoin (in several strengths), stronger adapalene 0.3 percent, and tazarotene (the most potent). They work by normalising how skin cells shed, which prevents the pore-plugging that starts acne. Apply a pea-sized amount across the whole affected area at night, expect dryness and peeling in the first few weeks (sometimes called the retinoid adjustment phase), moisturise, and wear sunscreen daily because retinoids increase sun sensitivity. Allow 8 to 12 weeks for benefit. Retinoids are continued long term to keep acne away, not just used during a flare. They are avoided in pregnancy.

Topical antibiotics such as clindamycin and erythromycin reduce inflamed spots. They are never used alone (to avoid resistance) but are paired with a retinoid or benzoyl peroxide. Convenient combination gels bring a retinoid plus benzoyl peroxide, or an antibiotic plus benzoyl peroxide, into a single product.

Azelaic acid is useful for both acne and dark marks, is gentle, and can be used in pregnancy.

How to apply. Use products on clean, dry skin (wait 15 to 20 minutes after washing), use only a pea-sized amount for the whole face, and keep them away from the eyes, lips, and nostril edges. The cost of topical treatment is roughly 300 to 1,500 rupees a month and is sustainable for long-term maintenance.

When acne is moderate to severe, or creams alone are not controlling it, a dermatologist may add a tablet that works from the inside.

Oral antibiotics such as doxycycline or minocycline are used for inflamed acne in short courses of 3 to 6 months, always alongside topical retinoids and benzoyl peroxide. Courses are kept short to avoid antibiotic resistance, and the topical treatments continue afterwards for maintenance. Doxycycline can increase sun sensitivity (wear sunscreen) and should be taken with food and plenty of water, sitting upright for about 30 minutes to avoid throat irritation.

Hormonal treatment suits girls and young women whose acne follows a hormonal pattern: along the jawline, flaring before periods, starting later in the teens, or linked to polycystic ovary syndrome. Combined oral contraceptive pills lower androgen activity on the oil glands, with clear benefit after 3 to 6 months; some pills are specifically used for acne and hirsutism. In families where contraception raises concerns, it is fair and accurate to explain that the pill is being used here as a medical treatment for acne. Spironolactone is another option that blocks androgens and works well for hormonal acne; it needs occasional blood tests to check potassium and must not be used in pregnancy. The way hormones drive acne is similar across the menstrual cycle and PCOS, which is why these treatments help.

Isotretinoin is the most effective acne treatment we have and is reserved for severe, scarring acne or moderate acne that has not responded to other treatments. Because it is so powerful and needs careful handling, it has its own section below.

Isotretinoin (a vitamin A derivative, sold under several brand names in India) is the most effective acne medicine available. It is reserved for severe nodular or cystic acne, or moderate acne that has not cleared with other treatments, because it works on all four causes of acne at once: it shrinks oil glands, normalises pore shedding, reduces bacteria, and calms inflammation. A single 6 to 9 month course gives lasting clearance for most people, with a minority needing a second course later.

How it is taken. A dermatologist sets the dose by body weight, often starting lower for the first month to build tolerance, and takes the capsule with a meal containing some fat for better absorption. You will have monthly check-ups and monthly blood tests to monitor liver enzymes and blood fats.

Side effects you will manage:

• Dry skin and chapped lips for almost everyone. Use lip balm and a body moisturiser generously throughout the day.
• Dry eyes (lubricating drops help) and a dry nose that can lead to nosebleeds (saline spray and a little petroleum jelly help).
• Mild aches, and increased sun sensitivity (wear sunscreen).
• Usually mild rises in liver enzymes and triglycerides, which is why blood is monitored and alcohol is avoided.

• Mood changes including low mood are an uncommon but recognised effect. Tell your dermatologist promptly if your mood changes, and the medicine can be stopped.
• Isotretinoin causes serious birth defects. Girls and women who could become pregnant must use reliable contraception from one month before, throughout, and for one month after treatment, with pregnancy testing as advised by the dermatologist.
• It should not be combined with tetracycline antibiotics (such as doxycycline) because of a rare risk of raised pressure around the brain.

Diet is not the main cause of acne (hormones are), but a few patterns have modest, slow effects. Treat these as helpful alongside medical treatment, never as a substitute for it, and give any change 2 to 3 months.

Foods with some evidence:

• High-glycaemic foods that spike blood sugar (white rice, maida, sweets, sugary drinks, refined snacks) may worsen acne. Swapping toward whole grains such as brown rice, ragi, jowar, and millets, and cutting back on sweets and cold drinks, can help modestly.
• Dairy, especially skimmed milk, has more evidence for worsening acne than full-fat dairy. If your diet is very dairy-heavy with milk, paneer, and curd, trying a reduction for a couple of months is reasonable.
• Omega-3 fats (walnuts, flaxseed, fish) are anti-inflammatory and worth including.

• Sleep of 7 to 9 hours and managing stress, since stress hormones can worsen acne. Yoga, breathing practice, and time outdoors all help.
• Regular exercise, with a gentle cleanse afterwards so sweat does not sit on the skin.
• Avoiding hand-to-face habits, dirty phone screens, and unwashed pillowcases.

Two different things are left behind after acne, and they are treated differently. This matters especially in Indian skin tones, where marks can be very noticeable.

Dark marks (post-inflammatory hyperpigmentation). These flat brown spots appear where an inflamed spot has healed and are caused by extra pigment, not by scarring, so the skin surface stays smooth. They are more prominent and longer-lasting in brown skin, often taking months to fade. Helpful treatments include niacinamide, azelaic acid, vitamin C serums, and short, dermatologist-guided courses of hydroquinone or peels. Daily sunscreen is essential, because sun exposure makes these marks darker and slower to fade. Most dark marks clear over 6 to 12 months with consistent care.

True scars. These are changes in skin texture. Depressed (atrophic) scars include narrow ice-pick scars, sharp-edged boxcar scars, and broad rolling scars. Raised (hypertrophic) scars and keloids are more common on the chest, back, and jawline and in people prone to them. Treatments are done by a dermatologist and often combined over several months for the best result. Options include chemical peels, microneedling, fractional lasers, subcision for rolling scars, fillers, and minor surgical techniques for ice-pick scars; raised scars are usually treated with steroid injections and silicone sheets. Costs vary widely depending on the method and extent.

The key message: scar treatment works but is harder, slower, and costlier than scar prevention. The best way to avoid scars is to treat active acne early and never pick at it, which is also good for your confidence and body image during these years.

See a dermatologist promptly if any of the following apply:

• You have painful, deep nodules or cysts, because these scar easily and need stronger treatment.
• You already see scars forming or persistent dark marks.
• Acne covers large areas, including the chest, back, or shoulders.
• A good over-the-counter routine has not helped after 8 to 12 weeks of consistent use.
• Acne is affecting your mood, confidence, sleep, or willingness to go to school or social events.
• You are a girl with acne plus other signs of high androgens such as irregular periods or extra hair growth, which can point to PCOS and is worth assessing.

• American Academy of Dermatology: Acne resource center
• NHS: Acne
• World Health Organization: Adolescent health
• American Academy of Dermatology: Isotretinoin and pregnancy prevention
• Ministry of Health and Family Welfare (India): Tele-MANAS mental health support