Excessive secretion of oil on the face, generally known as seborrhea, the common causes are mainly the following: 1, genetic factors: some patients have a family history, especially more male patients. 2, androgen secretion: after puberty androgen secretion is high resulting in increased functional activity of the sebaceous glands and increased secretion of oil. 3, B vitamin deficiency: some patients take oral vitamin B complex, sebum secretion will be reduced 4, disease: such as hyperthyroidism, Parkinson’s syndrome, etc. 5, other causes: such as eating spicy food, eating fried, fried food, often stay up late, etc.