There are physiologic and pathologic causes of severe oiliness on the face and head (common factors include seborrheic dermatitis, other diseases, etc.). 1. Physiological factors Usually, some people in the role of genes, sebaceous glands natural secretion is more vigorous, the secretion of more oil, that is, oily dermatitis, there will be a lot of oil on the face and head; in addition, long-term spicy and greasy sweet food, mental stress, too much pressure, long-term stay up late, etc., is also prone to promote the secretion of sebaceous glands. 2. Pathological factors Seborrheic dermatitis: the etiology of this disease is not clear, and it is related to Malassezia colonization, increased lipids, impaired skin barrier function, immune response, etc. It occurs in the head, face, chest, back, and the lesions are erythematous, oily desquamation, greasy scabs, and obvious inflammation under the scabs, with symptoms such as exudation. Other diseases: the secretion of sebaceous glands is regulated by sex hormones. If the hormone level in the body is disturbed due to the presence of hyperthyroidism, polycystic ovary syndrome and other diseases, the sebaceous glands will be further stimulated to secrete excessive sebum, leading to the symptoms of oily head and face. It is recommended that patients according to their own situation, if you suspect that the disease is caused by the need to go to the regular hospital dermatology consultation, follow the doctor’s instructions to clarify the diagnosis, active treatment, to avoid delaying the condition.