The harm of azelaic acid to the skin
It has certain benefits for the skin. However, it is not suitable for sensitive skin. Its function is to kill bacteria and dissolve dead skin cells, preventing follicular clogging and keratinization—in simple terms, treating acne and closed comedones. So, what harm does azelaic acid cause to the skin?
What are the side effects of azelaic acid on the skin?
Azelaic acid can indeed cause harm to the skin. Some people may develop rashes with long-term use. Additionally, azelaic acid exfoliates the skin by removing dead skin cells, but excessive exfoliation may lead to peeling. It may also increase skin sensitivity, making the skin prone to allergic reactions upon slight exposure to allergens, resulting in redness, rashes, and itching. Therefore, during folliculitis treatment, medication must be used strictly as directed. Once the condition gradually improves, discontinue or reduce the dosage. Skin repair measures are essential during this period to prevent repeated irritation.

Its action involves killing bacteria and dissolving aged keratin, preventing follicular buildup and keratinization—simply put, clearing acne and closed pores. This ingredient is highly effective; first-time users with acne-prone skin are often surprised by the results. However, there are side effects (yes, nothing comes without a cost), such as itchiness.

The degree of itching varies from person to person. However, this itchiness does not necessarily indicate an allergic reaction—it is simply temporary discomfort. Those who find it intolerable are advised to start with localized application. Hope this answer helps you. Wishing you good health and happiness!