Retino-A Micro 15gm contains tretinoin, a topical medicine used for the treatment of acne and certain skin conditions. Tretinoin works by increasing skin cell turnover and helping prevent clogged pores. It may also help improve the appearance of acne-related skin changes with regular use. The product should be applied to the affected area as directed by a healthcare professional, as it may cause dryness, redness, or skin irritation in some people