An oily face and oily hair is caused by over-secretion of the sebaceous glands and is also affected by dietary factors as well as hygienic conditions. 1. The sebaceous glands have a high secretion function. It will increase the sebum secretion, which will make the skin or hair look greasy. As androgen is another important substance that affects the secretion function of sebaceous glands, when the body’s androgen secretion is vigorous, the secretion function of sebaceous glands will also be significantly enhanced. So for people with oily skin, it is necessary to improve the sex hormone six tests. 2. Dietary factors. For some people who like to eat greasy food or spicy food, the amount of oil secretion will also increase significantly, so the skin will also appear more oily. 3. Hygiene. For some people who do not pay attention to hygiene, due to the discharge of oil secretion is not timely removed, resulting in the distribution of oil in the skin surface accumulation, which will also make the skin become more oily. Measures to improve the greasy skin, first of all, pay attention to hygiene, while controlling the diet, if necessary, can be given under the guidance of the doctor medication.