A heavy brain oil odor indicates that the sebaceous glands in the scalp are flourishing and producing too much oil. Excessive oil production from the scalp is called seborrhea. Seborrhea refers to the excessive production of sebum by the sebaceous glands, which exceeds that of a normal person of the same age and sex. The development and secretion of sebaceous glands are mainly influenced by endocrine factors, so the function of sex hormones, especially male hormones, plays an important role in seborrhea. When male hormone levels are high, sebum production increases. Increased sebum secretion is called seborrhea, which can lead to seborrheic dermatitis and even seborrheic alopecia. Patients should live a regular life, wash their hair often, often use sulfur soap to remove oil, keep the head clean. Pay attention to diet, avoid spicy and stimulating food, avoid eating food with too much fat, and avoid staying up late.