Hair out of oil powerful may be related to genetic factors, seborrheic dermatitis, diet greasy, etc., need to be specifically analyzed. 1. Genetic factors: affected by genetic factors, born with oily skin, hair oil will also be more, should pay attention to head hygiene and cleanliness, to prevent hair oil aggravation. 2. Seborrheic dermatitis: Seborrheic dermatitis is a chronic, recurring, inflammatory skin disease commonly found on the head, face, chest, back and other seborrheic areas. It is associated with Malassezia colonization, increased lipids, impaired skin barrier function, immune response and individual susceptibility, and can cause increased hair oil. 3. Dietary grease: consuming too much fried food or high-fat food can also cause sebaceous glands to secrete oil, resulting in oily hair, it is recommended to eat a light diet, avoid spicy greasy stimulating food. There may be other reasons for oily hair, so it is recommended to go to the hospital for diagnosis, clarify the cause of the disease, and treat it under the guidance of the doctor.