Head acne may be caused by acne, folliculitis, tinea capitis and other diseases. 1. Acne: the cause may be related to abnormal androgen levels, increased sebum secretion and other factors, mainly manifested as pimples, pustules, etc., which can be seen on the forehead, back and so on. 2. Folliculitis: the cause is mainly related to Staphylococcus aureus infection, patients will appear locally with red papules, usually centered on hair follicles, which can be seen on the head, face, trunk and other parts of the body. 3. ringworm of the head: the cause is mainly caused by dermatophyte infection of the scalp, usually white ringworm, yellow ringworm, pustular ringworm, etc., the patient’s head will appear pimples, pustules and other symptoms, accompanied by itching and pain. The causes of head acne are more reasons, it is recommended to go to the regular hospital to consult the examination, to clarify the cause of the disease.