It is very likely that old oily hair is caused by heavy dampness in the body, but it may also be caused by sebaceous gland secretion and usual bad living habits, so when this happens, it cannot be uniformly considered to be caused by heavy dampness. Heavy dampness in the body is related to the spleen. Weakness of the spleen and stomach causes poor digestion and absorption, poor transportation, and the accumulation of food in the body generates dampness, which is manifested as easy sleepiness, dizziness, sticky stools, and easy oiling of the scalp. However, old oily hair may also be due to seborrheic dermatitis, too greasy diet, irregular work and rest, etc. If the scalp oil serious hair loss, it is recommended to promptly consult the hospital dermatology department to use medication as prescribed by the doctor. People with old oily hair have a light diet and wash their hair every other day to ensure local cleanliness of the scalp to avoid hair loss and other situations. If the dampness in the body is heavy, it is recommended that the patient go to the local Chinese medicine department for a face-to-face consultation for evidence-based treatment.