Frequent hair loss can be a sign of certain diseases or it can be normal. Hair follicles, like trees, have a time when they are growing vigorously and a time when they are dormant and ready for winter, and hair loss is manifested when hair follicles gradually enter the dormant phase from the growth phase. The degree of hair loss varies greatly depending on the body type, the number of congenital hair follicles, and the speed of metabolism. If the hair is significantly thinner, it may be due to the following reasons: First, poor nutritional status, such as after dieting. Second, seborrheic alopecia. Third, fungal alopecia. Fourth, hair pulling fetish caused by mental tension, etc. It is best to determine the specific cause of hair loss in a face-to-face consultation.