Pimples are also known as acne. Acne on the face is related to exuberant secretion of androgens, hyperkeratosis of the sebaceous gland ducts of hair follicles, as well as propagation of Propionibacterium acnes and emotional factors. 1. Genetic factors: If one parent has a history of acne, the next generation has a significantly higher chance of developing acne. 2. Excessive secretion of androgens: Excessive secretion of androgens causes rapid metabolism, which promotes the secretion of large amounts of sebaceous glands in the hair follicles, which can easily trigger acne. 3. Hyperkeratosis of follicular sebaceous gland ducts: Hyperkeratosis of follicular sebaceous gland ducts will lead to poor excretion of secretions, and the accumulation of secretions will lead to the formation of acne. 4. Propionibacterium acnes reproduction: The growth and reproduction of microorganisms such as Propionibacterium acnes in the hair follicle will form an inflammatory reaction, thus triggering acne. 5. Emotional factors: Frequent emotional depression, nervousness, anxiety, etc., are also prone to triggering acne. There may be other reasons for acne, so it is recommended that you go to the hospital first to check the cause of the problem and follow the doctor’s instructions for standardized treatment.