The reasons for the oiliness of the face are genetic factors, endocrine disorders, environmental factors, dietary factors, and long-term life irregularities, as follows: 1. Genetic factors: Consider genetic factors, if the parents are oily skin, then the children may also inherit oily skin. 2. Endocrine disorders: Endocrine disorders lead to increased secretion of androgens, androgens can stimulate the sebaceous glands of hair follicles to secrete more oil. The first thing you need to do is to get a good idea of what you are getting into. 5, long-term life irregularities: long-term life irregularities, such as staying up late, poor rest, will also increase the oil secretion of the skin. Therefore, for the face oil, many patients need to go to the regular hospital, under the guidance of dermatologists to carry out the appropriate treatment.