Azelaic acid can cause purging in some people, but it is less common and usually milder than with retinoids or strong exfoliating acids. Knowing the difference between a purge and a reaction will help you decide whether to keep going.
What azelaic acid does
Azelaic acid is a naturally occurring acid. It targets melanin production, which helps with dark spots and uneven tone, and it has antibacterial and mild exfoliating effects, which is why it is used for acne and rosacea. It comes in prescription strengths (such as 15% gels and 20% creams) and in lower amounts in cosmetic products.
What purging is
Purging happens when an ingredient speeds up how fast your skin sheds cells. Clogs that were already forming under the surface come up faster, so you see small breakouts for a few weeks before the skin clears. Because azelaic acid has a mild exfoliating effect, it can do this for some people.
Purging or irritation?
A purge tends to show up where you normally break out, as small bumps or whiteheads, and fades within four to six weeks. Irritation looks different: redness, burning, itching or breakouts in new places that don’t settle. A mild tingle in the first days is common with azelaic acid and usually fades. If your skin burns, swells or keeps getting worse, stop and talk to a dermatologist or pharmacist.
How to start azelaic acid gently
- Start every other day and build up to daily use.
- Apply to clean, dry skin.
- Keep the rest of your routine simple while your skin adjusts.
- Wear sunscreen every morning.
A lower amount in a moisturizer is an easy way to begin. The Biostem Daily Moisture Complex combines azelaic acid with vitamin C, arbutin and licorice root in a daily cream, so it works on uneven tone while it hydrates.
Frequently asked questions
How long does azelaic acid purging last?
Usually four to six weeks, about one skin cycle. If breakouts continue past that, it is more likely a reaction than a purge.
Does azelaic acid tingle?
A mild tingle or itch in the first days is common and usually fades as skin gets used to it.
Can I use azelaic acid with vitamin C?
Yes. They are often used together for uneven tone. Our guide on where vitamin C goes in your routine explains the order.