Azelaic Acid

Using it

Azelaic acid is used mainly for acne, papulopustular rosacea, post-acne marks (post-inflammatory hyperpigmentation) and melasma. It calms inflammation, reduces acne bacteria, unblocks pores and slows overactive pigment cells.

Very little is absorbed through the skin, and azelaic acid is generally regarded as one of the safer topical treatments for acne and rosacea in pregnancy and breastfeeding. Always confirm with your doctor before starting any treatment when pregnant.

Inflamed acne and rosacea bumps often start to improve within four to six weeks. Pigmentation and post-acne marks take longer, usually eight to twelve weeks. Give it at least three months before deciding whether it has worked.

Most clinical studies used 15% gel or 20% cream, which are prescription strengths in many countries. Cosmetic serums at around 10% can help mild concerns, but for acne, rosacea or melasma the evidence supports 15–20%.

Yes, as part of a combination. In studies, 20% azelaic acid performed similarly to 4% hydroquinone, with fewer side effects. It will not clear melasma on its own, and daily sunscreen remains essential.

For the bumps and pustules of papulopustular rosacea, 15% azelaic acid is a first-line treatment. It does little for background flushing or visible blood vessels, which respond better to vascular laser.

It helps brown marks (post-inflammatory hyperpigmentation) most, particularly in darker skin. Red or purple marks are driven by blood vessels and usually respond better to vascular laser.

Yes, and it is a very effective pairing for acne and pigmentation. If your skin is sensitive, apply them at different times of day, for example azelaic acid in the morning and a retinoid at night.

Niacinamide combines well and can reduce irritation. Vitamin C is fine in the same routine. Layering strong exfoliating acids on top can increase stinging, so introduce one product at a time.

Mild tingling, itch or warmth is very common in the first one to two weeks and usually settles. If redness, swelling or itch persists beyond that, stop using it and see your doctor.

Either works, as it does not make skin more sensitive to the sun. Many people use it in the morning under sunscreen and keep a retinoid for night.

Yes. It is one of the most useful ingredients for darker skin, because it treats acne and the pigmentation that follows without the irritation that can trigger further darkening. Rarely, lightening of the skin has been reported.

Azelaic acid does not typically cause the purge seen with retinoids. New breakouts in the first weeks are more likely to be your usual acne before the treatment takes effect.

No. Azelaic acid improves marks and discolouration, not textural scars. Indented scars need procedures such as TCA CROSS, subcision or laser resurfacing.

Azelaic acid is one of the most underrated ingredients in dermatology. It rarely gets the attention that retinoids or vitamin C receive, yet I prescribe it every day, because it does three jobs at once: it calms inflammation, it treats acne, and it quietens pigment.

That combination matters most in skin of colour. In my Asian, South Asian, Middle Eastern and olive-skinned patients, the pimple is often not the main problem. The brown mark it leaves behind is. Azelaic acid treats both the spot and the mark, and it is far gentler than many alternatives. It is also my first choice for acne and rosacea in pregnancy and breastfeeding, when many other options are off the table.

In rosacea, I use 15% azelaic acid as a first-line topical for bumps and pustules. It will not remove the background flushing or broken capillaries. That is the job of a vascular laser, and patients are best served when they know that from the outset.

How I prescribe it: a thin layer over the whole area, starting every second night, then building to once or twice daily. Expect tingling for the first week or two. It is a sign the product is on the skin, not a sign it is failing. I ask patients to give it twelve weeks before we judge it.

Where it fits in a plan: rarely on its own. For acne, I pair it with a retinoid. For melasma, it sits alongside sunscreen, tranexamic acid and other pigment inhibitors, and never as the only treatment. Before and after laser, I use it to prepare pigment-prone skin and reduce the risk of post-laser darkening.

What it is not: a treatment for scarring. Once a scar has formed, no cream will lift it. That is where procedures such as TCA CROSS, subcision and resurfacing come in. The best time to use azelaic acid is early, to reduce the inflammation that causes scars in the first place.