Greasy skin easy to oil may be due to endocrine disorders, skin dehydration, dietary habits and other reasons. 1. Endocrine disorders: generally due to patients staying up late for a long time, drug abuse, mental stress, etc., caused by androgen secretion, sebaceous gland secretion and gland enlargement can occur, thus appearing greasy skin easy to come out of the oil. 2. Skin dehydration: When the skin is seriously dehydrated, it can also cause the skin to be greasy and oily. This is mainly due to the fact that when the skin is dehydrated, it will secrete its own oil to protect the dry skin. 3. Dietary habits: If the patient likes to eat stimulating and greasy food, it will promote the secretion of sebaceous glands, which will lead to greasy and oily skin. There may be other reasons for greasy skin, if the symptoms persist or worsen, it is recommended that the patient go to the hospital in a timely manner, and follow the doctor’s instructions for treatment, to avoid delaying the condition.