It is normal to lose less than 100 strands of hair a day, but if you lose more than 100 strands of hair a day, it is abnormal and requires active treatment. Under normal circumstances, the human body cells are in the process of metabolism, due to metabolism every day a certain amount of hair loss. In addition, if the diet is not balanced, resulting in a lack of nutrients in the body, the lack of nutrient supply of hair, will make the growth of hair is inhibited, but also affect the quality of hair, hair loss. Hair loss of less than 100 hairs per day is normal. Human hair has a growth period, regression, resting period, a cycle of shedding process, in the hair fall, there will often be an equal amount of new hair growth. However, if you suffer from certain diseases, such as androgenetic alopecia, baldness, etc., there will be pathological hair loss, hair loss of more than 100 hairs per day, need timely treatment.