The cruelty of acne advice is that most of it makes acne worse. Wash more. Use something stronger. Dry it out. Every one of those instincts damages the skin barrier, and a damaged barrier is inflamed, and inflammation is a core part of how acne forms.

So the counterintuitive summary up front: treating acne well involves being gentler than you want to be, and waiting longer than you want to wait. Twelve weeks is the honest timeframe for judging any treatment. Almost everyone gives up at four.

What acne actually is

Four things happening together in a follicle.

Excess sebum production, usually driven by hormones. Dead skin cells shedding abnormally inside the follicle rather than sloughing off. Both combine to block the pore. Cutibacterium acnes, a bacterium that lives on everyone’s skin, then multiplies in that oxygen-poor blocked environment. And the immune system responds with inflammation, which is the redness, swelling and pain.

Effective treatments target one or more of those four. Which is why “drying it out” doesn’t work — dryness isn’t on the list.

The types matter

Comedonal: blackheads and whiteheads, minimal inflammation. Responds well to retinoids and salicylic acid.

Inflammatory: red papules and pustules. Responds to benzoyl peroxide, retinoids, azelaic acid.

Nodulocystic: deep, painful lumps under the skin. This needs a GP. Over-the-counter products will not resolve it, and it scars.

Hormonal: typically along the jaw and chin, often flaring with the menstrual cycle. May need hormonal treatment rather than topicals alone.

The ingredients that work

Benzoyl peroxide

Kills C. acnes directly, and bacteria don’t develop resistance to it. Available over the counter in the UK.

Start at 2.5%. Studies consistently find 2.5% as effective as 5% and 10%, with substantially less irritation. Higher strengths sell better and work no better.

It bleaches fabric. Your towels, pillowcases and collars will discolour. Use white ones.

Salicylic acid

Oil-soluble, so it penetrates into the pore and clears the blockage from inside. Best for blackheads and congestion. Usually 0.5% to 2% — detail in salicylic acid toner.

Retinoids

Normalise how skin cells shed inside the follicle, preventing blockages forming. The best long-term option, and they help with the marks left behind at the same time.

Adapalene is available over the counter in the UK for acne. Tretinoin is prescription. Expect an initial purging phase of six to eight weeks.

Azelaic acid

Antibacterial, anti-inflammatory, and it helps with post-inflammatory pigmentation. Well tolerated, and one of the few actives generally considered suitable in pregnancy. Underused and genuinely good.

Niacinamide

Reduces inflammation, supports the barrier, helps regulate oil. Gentle, pairs with everything.

What to expect from a GP

Worth knowing, because a lot of people self-treat for years when a prescription would have sorted it.

UK GPs can prescribe topical retinoids, topical or oral antibiotics (usually alongside benzoyl peroxide to limit resistance), and combination products. For women, some combined hormonal contraceptives are effective for acne.

For severe or scarring acne, referral to dermatology for isotretinoin. It’s a highly effective treatment with significant side effects and mandatory monitoring, including strict pregnancy prevention requirements — it causes serious birth defects. That’s a specialist conversation, not a website one.

See a GP if: your acne is painful, deep or cystic; it’s leaving marks or scars; over-the-counter treatment hasn’t helped after three months of consistent use; it’s affecting your mood or confidence; or it started suddenly in adulthood.

That last one matters. Sudden adult acne, particularly with irregular periods or excess hair growth, can indicate PCOS or another hormonal issue worth investigating.

A routine that works

Simple, and the simplicity is the point.

Morning: gentle cleanser, niacinamide or azelaic acid if you use one, light moisturiser, sunscreen.

Evening: cleanser (double cleanse if you wore sunscreen or makeup), treatment active, moisturiser.

Introduce one active at a time, three times a week to start, building up. Adding benzoyl peroxide, salicylic acid and a retinoid all at once is how people end up with a wrecked barrier and worse acne.

Cleanse gently. The instinct to scrub is strong and it’s wrong — the approach in the face cleansing routine guide applies directly.

Moisturise. Every day, even if you’re oily. A damaged barrier worsens acne, and every acne active is drying.

Sunscreen daily. Acne actives increase photosensitivity, and UV darkens post-inflammatory marks — which are often what bothers people more than the spots.

Timelines, honestly

Individual spot: 3–7 days with treatment.
Reduced new breakouts: 4–6 weeks.
Noticeable improvement: 8–12 weeks.
Full effect of a retinoid: 3–6 months.
Post-inflammatory marks fading: 3–12 months.
Purging on starting a retinoid: 6–8 weeks before it settles.

Twelve weeks is the assessment point. Anything judged before that is judged too early, and switching products every three weeks is the single most common reason people never get on top of it.

What makes it worse

Over-washing and harsh cleansers. Physical scrubs on inflamed skin. Alcohol-heavy toners. Stacking multiple actives at once. Picking and squeezing, which drives inflammation deeper and causes scarring. Skipping moisturiser. Skipping sunscreen. Switching products constantly. And DIY remedies — toothpaste, lemon juice, bicarbonate of soda — which irritate without treating.

Diet, and what the evidence says

This gets asked constantly and deserves a careful answer.

There’s reasonable evidence associating high-glycaemic-index diets with acne, and some evidence around skimmed milk specifically. Chocolate’s role is unclear despite its reputation.

The effect sizes are modest and individual variation is large. Diet is worth considering as one factor; it is not usually the main one, and blaming diet often delays effective treatment.

The marks left behind

Post-inflammatory hyperpigmentation — the brown or red marks after a spot heals — is not scarring and does fade, though slowly. Sunscreen is the most important thing for it. Treatment options are in dark spot treatment.

Actual scarring — indented or raised texture — does not resolve with skincare and needs professional treatment. Prevention is the only reliable approach, which means treating acne early and not picking.

Related concerns

If congestion and visible pores are your main issue rather than inflammation, pore minimisers covers what can and can’t change.

If your barrier is already damaged from over-treating, calming it down comes before anything else — see cica cream.

And if you’re considering stronger exfoliation, the options and risks are in chemical peel at home.

This article is general information, not medical advice. Acne is a medical condition and effective prescription treatments exist. Please see a GP if your acne is severe, painful, scarring, or not responding to over-the-counter treatment — and particularly if it is affecting your mental health, which is common and worth saying out loud at the appointment.