There are many reasons for acne on the top of the head, such as not paying attention to cleanliness and hygiene, improper diet, seborrheic dermatitis and so on. 1. Don’t pay attention to cleanliness and hygiene: not doing a good job of cleaning and hygiene on the top of the head in daily life may cause bacterial growth, inducing folliculitis, which will lead to the phenomenon of acne on the top of the head. 2. Improper diet: Eating spicy, spicy and other heavy foods for a long time, or drinking alcohol for a long time, etc., may lead to excessive secretion of sebaceous glands, thus leading to acne on the top of the head. 3. Seborrheic dermatitis: Seborrheic dermatitis may be due to improper diet, androgen secretion and other factors, which can cause excessive secretion of sebaceous glands, combined with bacterial or fungal infections can lead to the phenomenon of head acne. There are many reasons for head acne, and after the symptoms, it is recommended to go to the hospital in time to improve the examination, and take standardized treatment according to the doctor’s instructions, not to ignore the symptoms, and take it lightly.