Acne vulgaris is considered as one of the most common skin disorders. Its etiopathogenesis is based mainly on sebaceous gland overactivity, the influence of hormones, the presence of Cutibacterium acnes bacteria, abnormal keratinization of the outlets of the hair follicles and sebaceous glands, genetic factors and immunological disorders. Post-inflammatory hyperpigmentation occurs as a consequence of inflammatory skin conditions, such as acne vulgaris, and other similar diseases. They arise as a result of persistent inflammation, which stimulates melanocytes to synthesize melanin. The aim of this study was to evaluate the efficacy of 30% azelaic acid in a 25-year-old man with symptoms of acne vulgaris and post-inflammatory hyperpigmentation.
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Słupianek et al. (2024) studied this question.
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