Period acne: why you break out before your period

What period acne looks like

You know the pattern: skin looks fine for two weeks, then a few deep, sore spots arrive on your chin or jaw just as PMS kicks in. Premenstrual flares are very common in adult women, including people who didn't have acne as teenagers. The American Academy of Dermatology notes that hormone fluctuations, including around periods, are a common trigger of adult acne.

• Red, tender bumps or deeper, painful spots under the skin
• Mostly on the chin, jawline and lower cheeks, sometimes the neck, chest or back
• Appearing about 7 to 10 days before your period
• Settling down a few days after bleeding starts

Why your skin breaks out before your period

Your skin's oil glands are sensitive to hormones. Androgens (like testosterone, which everyone has) increase oil production. Estrogen tends to calm it. In the luteal phase, progesterone rises, then both estrogen and progesterone fall before your period, so the androgen effect is relatively stronger. Pores also tend to swell and narrow in the second half of the cycle. More oil plus tighter pores means more blockages and more inflammation.

What helps period acne

Everyday skincare

• Benzoyl peroxide (2.5 to 5% is often enough) reduces acne bacteria and inflammation. It can bleach towels and pillowcases.
• Adapalene, a retinoid gel available without a prescription in the US, unclogs pores. Use it every night, not just in the bad week, since it takes 8 to 12 weeks to work. Avoid retinoids if you're pregnant or trying to be.
• Salicylic acid helps with blackheads and mild clogged pores.
• A gentle cleanser twice a day and a non-comedogenic moisturizer. Over-scrubbing makes inflammation worse.
• Hands off. Picking deep spots raises the risk of marks and scars.

Medical treatment

If over-the-counter care isn't enough, a doctor or dermatologist can help. Options for hormonal acne include certain combined contraceptive pills, which lower androgen levels, and spironolactone, a prescription medicine that blocks androgen effects on the skin. Prescription retinoids, topical antibiotics combined with benzoyl peroxide, and for severe or scarring acne, isotretinoin, are also options.

Lifestyle, honestly

Evidence on diet is still developing. Some studies link high-glycemic diets (lots of sugar and white flour) and, for some people, dairy with worse acne. Sleep and stress matter too, because stress hormones increase oil production. None of these is a cure, but they can turn the volume down.

Be patient with treatment

Almost every acne treatment takes time. Expect around 6 to 12 weeks before judging whether something works, and a little dryness or extra spots in the first weeks of a retinoid is common. Introduce one new product at a time, so you know what's helping and what's irritating. Combined pills for acne also need a few cycles to show their full effect. Keeping a simple photo diary every couple of weeks, plus a note of your cycle day, makes progress much easier to see than looking in the mirror each morning.

Skin and self-esteem

Breakouts land in the same week that many people already feel more self-critical, anxious or low. Spotting a new spot on day 24 can feel bigger than it is. Acne is a medical condition, not a hygiene failure, and you deserve treatment if it's getting you down. Read about low self-esteem before your period.