Blackhead removal with 15% azelaic acid is associated with a variety of hazards, including skin erythema, dryness, flaking, rashes, irritant dermatitis, localized itching, tingling, and burning sensations, and in a small number of cases, hypopigmentation of the skin, and asthma inducing conditions.
1. Azelaic acid to remove blackheads will cause skin erythema, make the skin dry, flaking, and may cause skin allergies, rashes, cause irritant dermatitis.
2. Localized itching, stinging, burning and other uncomfortable feelings.
3. A small number of patients using azelaic acid to remove blackheads will lead to localized hypopigmentation. A very small number of patients because of allergy will induce asthma or make the original asthma aggravation.
15% of azelaic acid to blackheads will appear in the above aspects of the harm, if the harm occurs, need to stop using in time. Azelaic acid to remove blackheads, need to be used under the guidance of a doctor.