Acne on scalp may be related to folliculitis, ringworm, boils and other diseases. 1. Folliculitis: It is mainly related to the blockage of sebaceous glands with Staphylococcus aureus infection. Red papules centered on hair follicles will appear locally, easily occurring on the head, face, thighs and other parts of the body, and pustules may appear with the condition. 2. Tinea capitis: mainly caused by dermatophyte infection, patients may have papules, pustules, flaking and other symptoms on the head, which may be accompanied by pain and itching. 3. Boils: mainly related to Staphylococcus aureus infection, skin injury, high temperature environment and other reasons may also induce the disease. Localized will appear red painful nodules, accompanied by swelling, pain, fever and other symptoms, common in the head and face, buttocks and other parts. There may be other causes of acne on the scalp, and it is recommended that patients go to a regular hospital to clarify the cause of the disease and follow the doctor’s instructions for treatment.