Does Azelaic Acid Treat Post-Inflammatory Hyperpigmentation?

Post-inflammatory hyperpigmentation appears after inflammation or injury leaves a darker area behind. Azelaic acid may reduce activity involved in making excess pigment and can be useful when acne or another inflammatory condition is still active. It does not erase a mark immediately, and a new flare can create additional pigmentation. The correct strength and schedule depend on the product, skin sensitivity, and affected area.

Use azelaic acid exactly as directed and apply it to clean, dry skin unless your clinician advises otherwise. Start cautiously if you are prone to irritation, and use a bland moisturiser to support comfort. Daily broad-spectrum sunscreen and shade help prevent dark marks from becoming more noticeable. Do not apply over broken skin, and avoid combining several irritating products without professional guidance.

Ask for medical advice if burning, swelling, blistering, or a worsening rash follows application, or if irritation continues after stopping. Arrange review when pigmentation is spreading, changing unexpectedly, or not improving despite consistent use. A clinician can confirm that the mark is Post-Inflammatory Hyperpigmentation and check for an ongoing source of inflammation.

Ask whether azelaic acid suits your skin and the cause of the pigmentation, how often to apply it, and which products should be kept separate. Ask how to protect the area from sunlight and what alternative treatment may be considered if irritation or limited improvement becomes a problem.