Constant oiliness on the face is usually caused by overactive sebaceous glands on the face that secrete large amounts of sebum. You can adjust your habits, improve your diet, and do a good job of protecting your face. 1. Adjust living habits: irregular life, often stay up late, will promote the secretion of facial oil glands, resulting in the face has been out of oil. You need to make sure you get enough sleep, avoid staying up late, and improve the quality of your sleep to help regulate the endocrine system and prevent the sebaceous glands from secreting too much. 2. Improve your diet: A poor diet can easily lead to endocrine disorders and an oily face. It is recommended to eat a light diet, more fruits and vegetables, and less spicy, stimulating and greasy food, such as chili peppers, fried chicken, barbecue, and so on. 3. Do a good job of facial protection: for those who have oily skin, it is recommended to use a mild cleanser to clean the face. Before going to bed, you can use moisturizing and hydrating masks to make the face water and oil balance, and you also need to choose some oil-control skincare products. Patients are advised to adjust their living habits and diet, and if the symptoms have not been relieved, they should consult the doctor for examination and treatment as prescribed by the doctor.