Pustules on the head are usually caused by not paying attention to hygiene, exuberant sebum secretion and aggravation of infection of folliculitis and other diseases. 1. Not paying attention to hygiene: If the hygiene habits are poor, so that the accumulation of dust, dandruff, sebum and other substances on the scalp in the scalp, over time may breed bacteria and other pathogens, leading to scalp infections, and then appear always pustules. 2. Exuberant sebum secretion: especially in adolescents, scalp sebaceous glands secrete sebum exuberantly, which may cause sebum to block the glandular ducts, and over time can develop into folliculitis and other localized infectious inflammation, which can lead to pustules on the head all the time. 3. folliculitis infection aggravation: if the scalp itself suffers from folliculitis, boils and other diseases, these diseases can cause scalp pustules, if the treatment of the disease is not complete, resulting in the disease is always recurring, accompanied by the infection, the head will always pustules. If pustules appear on the head, you should go to the regular hospital in time to find out the cause of the disease, and choose the appropriate method of treatment under the guidance of professional doctors.