Why does acne happen?

Acne is never one thing. It is four things stacking on top of each other. Skin cells build up in a pore instead of shedding. Hormones increase oil production, and that oil clumps into the plug. Bacteria that live on everyone’s skin overgrow inside the plugged pore. The body’s immune system responds with inflammation. The visible pimple is the last stage of that sequence.

That is why a single-ingredient product rarely fixes acne. A good routine has to address more than one of those steps at once.

When should you see a doctor about acne?

Severe acne with cysts and nodules, or acne that covers the back, chest, or shoulders, needs to see a GP or dermatologist rather than only skincare. The medications that work at that severity are prescription-only, and starting them earlier reduces the chance of permanent scarring.

In adult women, elevated androgens (often from polycystic ovarian syndrome) can drive persistent acne and are worth checking with a blood test. A GP can start there.

What is the best skincare for acne?

The evidence for topical acne skincare is strongest for a small number of ingredient categories. Everything below is stocked at Plumerian Aesthetics Bentleigh. Free pickup at the Bentleigh East clinic, or flat $10 shipping Australia-wide.

A gentle, low-pH cleanser

Twice a day. Soap-free, pH between 4.0 and 5.5. Foaming cleansers that strip the skin actually make acne worse over weeks by disrupting the skin’s acid mantle and letting bacteria flourish.

A retinoid

The single highest-leverage ingredient for acne. Retinoids clear the plug, cut oil, calm inflammation, and reduce bacterial overgrowth all at once. That is why dermatology guidelines describe them as the core of topical acne therapy.

Prescription retinoids sting and burn (studies show around 61 per cent of people using them get skin irritation). Retinaldehyde, also called retinal, is the most effective over-the-counter form and much better tolerated. Gentler than retinol, and much gentler than retinyl palmitate.

Niacinamide, for barrier and oil control

Reduces inflammation, cuts oil production, and strengthens the skin barrier. If your skin is reactive, this is often the calming layer that lets everything else finally work.

Salicylic acid, for individual pimples

A beta hydroxy acid that dissolves the plug inside a pore, exfoliates dead cells, and calms inflammation. Delivered directly into an emerging pimple through dissolving microneedle patches, it works faster than a topical alone.

Alpha hydroxy acids, for gentle exfoliation

AHAs work chemically rather than mechanically. They break the bonds between dead skin cells and let the buildup shed, without traumatising the skin the way a scrub does.

Daily sunscreen, ideally zinc oxide

UV is pro-inflammatory, and inflammation is the through-line of every stage of acne. The least glamorous most-effective anti-acne move most people are not making. Zinc oxide is a great mineral option because it is non-comedogenic and zinc itself reduces oil production in the skin.

What to skip

Scrubs and physical exfoliators. Whether apricot seed, microbeads, or sand. They remove a top layer for a day, then trigger a bigger breakout in the days after. Chemical exfoliation is safer and more effective.

Toothpaste, soap, or DIY spot treatments. High pH, harsh, and abrasive. They make pimples worse.

Rubbing the face dry. Pat with a clean towel. Rubbing bursts pimples that were not ready to come out.

Fad diets. Cutting dairy, going gluten-free, celery juice. No evidence any of these help acne. Teens can end up nutritionally short chasing them.

What else genuinely helps

Sleep. The evidence is consistent: the worse the sleep, the worse the acne. Not a nice-to-have.

Vitamin D. Deficiency is linked to acne. A GP blood test will tell you if you are low.

A lower glycaemic index diet. Two randomised controlled trials found low-GI eating reduces pimple count in people with acne. Speak to your GP before changing a teen’s diet substantially.

A note on patience

Skin turnover is slow. Any effective acne treatment needs six weeks to show whether it is working. Give it that time before switching, unless you are experiencing side effects that concern you. Switching every week or two is a common reason routines fail, not because the products were wrong but because they never got the run they needed.

If you are struggling

Acne affects self-esteem, body image, relationships, and mental health. That is not vanity. It is well-documented, and it is a valid reason to seek treatment. A GP, a dermatologist, or a considered skincare consultation is a step toward something better.