Severe facial oiliness is generally caused by genetic factors, high androgen, oily diet, rising temperature, etc. It can be improved by general treatment, medication, etc. There is no absolute “most effective” treatment method. 1. Genetic factors: some people are born with strong sebaceous gland secretion due to heredity, resulting in severe facial oil, which can be improved by timely cleaning of the face and the use of refreshing skin care products that do not contain oily ingredients. 2. High androgens: high androgens in the body or androgen sensitivity can lead to increased skin oil, men can take oral finasteride, women can take oral spironolactone and other anti-androgen drugs for treatment. 3. Dietary grease: Eating too much fried and high-fat food can also lead to increased facial oil, it is recommended to eat a light diet, avoid eating too much high-fat food. 4. Elevated temperature: Elevated ambient temperature can also increase skin oiliness, which can be improved by lowering the ambient temperature and paying attention to sun protection. Facial oil may also have other reasons, it is recommended that people with severe facial oil do a good job of skin care, and timely medical treatment, under the guidance of the doctor, standardized treatment, avoid self-medication, so as not to delay the condition.