Recurrent acne may be caused by recurrent attacks of acne, folliculitis and other diseases. 1. Acne: caused by factors such as changes in hormone levels, increased sebaceous gland secretion, and Propionibacterium acnes infection. Symptoms such as pimples, papules, and pustules on the cheeks, trunk, and other parts of the body appear, and if not treated in a standardized manner, it may result in recurring acne. 2. Folliculitis: folliculitis is mainly caused by bacterial infection, if the immune system is low, local friction, sweating and other factors stimulation may repeatedly induce folliculitis. The manifestation is a red papule or pustule centered on the hair follicle. Patients with recurring acne are advised to go to the hospital and find out the cause of the disease under the guidance of the doctor. Once diagnosed, you need to actively cooperate with the doctor to take treatment measures.