What azelaic acid is
Azelaic acid is a naturally occurring acid known as a dicarboxylic acid. It is found in some grains, and the version used in skincare is typically made in a lab. Despite the word “acid,” it is not usually grouped with the glycolic-type exfoliants. It behaves differently, and people often find it milder than they expect.
It is used for several quite different concerns at once, which is part of why it has a loyal following: blemish-prone skin, persistent redness and bumps, and uneven tone or marks left after breakouts.
What people commonly use it for
Blemishes and clogged-looking skin
Azelaic acid is thought to help in a few ways. It has some effect on the bacteria and inflammation involved in breakouts, and it may help normalize how skin cells shed inside pores. Together, that makes it a common option for those building an acne routine without wanting something as drying as other treatments.
Redness and rosacea-type bumps
It is also widely used for the red bumps associated with rosacea. If you suspect rosacea redness, it is worth having a health professional confirm what is going on, since redness has several possible causes and the right care depends on the cause.
Uneven tone
Azelaic acid is often suggested for hyperpigmentation, particularly the dark marks that remain after a pimple heals. It is generally considered to work on overactive pigment-producing cells more than on normal ones, which is one reason it is mentioned for tone concerns. Results typically take weeks to months to see, and marks fade at different speeds for different people.
Strengths and availability
Products sold over the counter in many places contain lower percentages, often around 10 percent, while higher strengths are commonly prescription-only. The rules vary by country, so this is general rather than universal. A prescriber can advise on whether a higher strength makes sense. Formula type matters too: gels, creams and newer suspensions feel different and can behave differently on the skin.
What it feels like
Many people notice mild tingling, itching or a slight burning sensation for the first couple of weeks, especially on sensitive or already irritated skin. Dryness and peeling can happen but tend to be milder than with retinoids or benzoyl peroxide. These sensations usually settle as skin gets used to it, but if they are strong or persistent, that is a reason to cut back or stop.
Rare reactions are possible, including swelling or a rash. Anyone with a known sensitivity to the ingredient or to other components of a formula should be cautious, and anyone with trouble breathing or facial swelling should seek urgent medical care.
How it can fit into a routine
- Start slowly. Apply a thin layer once a day, or even every other day, then increase if your skin is comfortable. Introducing products one at a time makes any reaction easier to trace.
- Apply to clean, dry skin. It is typically used after cleansing and before moisturizer. Waiting a few minutes before layering can reduce stinging for some people.
- Morning or evening. Either is common. Unlike some actives, azelaic acid is not generally described as making skin more sun-sensitive, though sunscreen is still a daily habit worth keeping.
- Pairing. Many people use it alongside niacinamide or a plain moisturizer. If you are also using retinoids or strong exfoliating acids, consider alternating nights or start azelaic acid on its own first. The reasoning behind that is covered in the article on mixing actives.
A patch test on a small area is a good idea before applying a new product to your whole face.
Who may want to be cautious
Azelaic acid is not suitable for everyone, and people with sensitive skin, eczema or a damaged skin barrier may find it stings at first. If you are pregnant or breastfeeding, ask a health professional about any active you plan to use. Guidance differs for different ingredients and formulations.
When to get help
If breakouts are painful, deep, scarring or not improving after a couple of months of consistent, gentle care, see a dermatologist or other qualified professional. The same goes for redness that is persistent, spreading, or accompanied by eye irritation. Azelaic acid can be a helpful part of care for some people, but results are never guaranteed.