Acne on scalp is usually a manifestation of folliculitis, which is usually caused by dietary stimulation or poor hygiene and low resistance. 1. Dietary stimulation: after long-term consumption of spicy and stimulating or fried food, the sebaceous glands of the hair follicles will be stimulated, and oil secretion will become more exuberant, which may lead to pimples on the scalp area. 2. Poor hygiene: many people do not pay attention to head cleaning, if the scalp area cleaning is not in place, the hair follicles are blocked easy to cause inflammation, resulting in folliculitis, usually the scalp area of the pimples subside after the hair will also lead to localized hair loss. 3. Low resistance: the human body due to lack of physical activity or by chronic wasting disease caused by low resistance, if not timely enhancement of physical fitness, then it is easy to be infected by bacteria caused by folliculitis. Patients suffering from folliculitis should go to the dermatology department in time to do a pathogen examination, according to their own infection and then do the treatment. Usually eat a light diet, ensure regular work and rest, improve their own resistance, and wash their hair regularly.