Acne has more marketing around it than any other skin concern and a short list of things that genuinely work. Here is the list, and what each one is actually for.
Nothing here is medical advice. Persistent, painful or scarring acne needs a doctor, and the most effective treatments are prescription-only.
First: what kind of acne do you have?
The treatment depends entirely on the type, and this is where most people go wrong.
Treating cystic acne with a salicylic acid toner will not work. Treating fungal folliculitis with benzoyl peroxide will not work. Identifying the type first saves months.
The four that have real evidence
1. Retinoids — the strongest evidence of anything available
Adapalene (over the counter in many markets) and tretinoin (prescription) normalise how skin cells shed, which addresses the blocked pore before it becomes a spot. They also improve texture and pigmentation.
Expect: worse before better. A purge of six to eight weeks is normal. Real results at twelve weeks, not four.
Start: twice a week, pea-sized for the whole face, on dry skin. Build up slowly.
2. Benzoyl peroxide — for inflammatory acne
Kills C. acnes bacteria, and unlike antibiotics it does not drive resistance. Best on red, angry spots.
2.5% works as well as 10% in comparative studies and irritates far less. Higher strength is not better.
Warning: it bleaches fabric. Old pillowcases and white towels.
3. Salicylic acid — for congestion
Oil-soluble, so it gets inside the pore lining rather than working on the surface. The correct choice for blackheads and closed comedones, and useless against cystic acne.
Needs a formulation at pH 3-4 to work. Plenty of products list 2% at near-neutral pH where most of the acid is inactive.
4. Azelaic acid — the gentle all-rounder
Works on inflammation, post-acne marks and mild acne simultaneously. Slower than the others, better tolerated than all of them, and one of the few actives generally considered acceptable in pregnancy — confirm with your own doctor.
What does not work
- Toothpaste. Irritates and can burn.
- Lemon juice. Photosensitising and badly pH-imbalanced.
- Pore strips. Remove the top of a blackhead. It refills.
- "Detox" products. Skin does not detox.
- Cutting out dairy, for most people. The evidence is weak and inconsistent, and elimination diets have real costs.
- More cleansing. Over-washing damages the barrier and makes everything worse.
Purging vs breaking out
Purging happens where you already break out, surfaces faster than usual, and clears within four to six weeks. Expected with retinoids and exfoliating acids.
Breaking out appears in new areas, or keeps worsening past six weeks. That is irritation or a reaction — stop.
When a topical will never be enough
See a doctor if your acne is cystic or nodular, if it is scarring, if it has not responded to twelve weeks of consistent over-the-counter treatment, or if it is affecting how you feel day to day.
Prescription options — oral antibiotics, hormonal treatment, isotretinoin — work on cases no serum will touch. Waiting years while cycling through products is how avoidable scarring happens.
A routine that works
Morning: gentle cleanser, light moisturiser, sunscreen.
Evening: gentle cleanser, one active, moisturiser.
One active. Not four. Give it twelve weeks before judging it.
Frequently asked
A retinoid — adapalene over the counter, tretinoin on prescription. It has the strongest evidence of any topical because it addresses the blocked pore before a spot forms. It takes twelve weeks and usually gets worse before better.
Purging appears where you already break out, comes up faster than usual, and clears within four to six weeks. Breakouts in new areas, or anything worsening past six weeks, is irritation — stop and let your barrier recover.
No. Comparative studies find 2.5% about as effective as 10% with substantially less irritation and dryness. Higher strength mostly buys you a damaged barrier.
If it is cystic or nodular, if it is scarring, if twelve weeks of consistent over-the-counter treatment has not helped, or if it is affecting your daily life. Prescription treatment works on cases no serum will touch.
