The frequent growth of blackheads on the face is mainly because the sebaceous glands secrete a large amount of sebum internally, and the sebum is darker due to the formation of redox reactions after contact with oxygen inside the hair follicle opening. This condition is related to the excessive secretion of sebaceous glands and is causally linked to poor rest and sleep. When there is poor rest and sleep, the skin is dry and the sebaceous glands will compensate by secreting a large amount of sebum, which forms a sebaceous film on the surface of the skin to protect the moisture inside the skin and ensure that the skin is moist. At this time, the metabolic function of the hair follicle is gradually reduced because of staying up late, so that the sebaceous glands inside it cannot be discharged smoothly and will accumulate inside the hair follicle, which will cause various diseases. The frequent eating of chili and sweets will also accelerate the secretion of sebaceous glands of hair follicles and trigger blackheads.