Butt grows out a lot of grains of red protuberance is very itchy and painful, a scratch on the broken bleeding and other symptoms are usually not considered herpes, more consideration is allergic dermatitis, folliculitis and other diseases. 1. Herpes refers to the human herpes virus (HHV) infection caused by the skin and mucous membrane changes in a class of diseases, manifested as limited, above the surface of the skin, containing liquid cavity damage (i.e., “blisters”), localized itching and pain. Herpes is mostly in the form of small blisters, rather than granular; and when herpes is scratched, there is more liquid oozing than bleeding, so it is not considered herpes. 2. Folliculitis is an inflammatory reaction of the hair follicle, usually caused by bacteria, fungi and viruses. Damage to the hair follicle or abnormalities in its own structure and metabolism can be triggers of folliculitis. The most common daily folliculitis is bacterial folliculitis, mainly caused by Staphylococcus aureus, often manifested as red papules centered on hair follicles, accompanied by itching and pain. 3. Allergic dermatosis refers to a group of diseases in which allergens enter the body through skin or mucous membrane contact, inhalation, injection and ingestion, leading to an abnormal immune response and triggering a series of symptoms in the skin; its typical manifestations are various types of rashes and papules, accompanied by different degrees of itching, tingling, redness and swelling, and so on. It is recommended that the patient go to the dermatology department of a regular hospital for consultation and receive standardized treatment according to the doctor’s instructions after the cause of the disease has been clarified.