Usually, to determine whether it is hair loss or normal hair loss, you can judge through the number of hair loss, changes in hair density, other manifestations and so on. 1. The amount of hair loss: normal people will lose about 40-100 hairs per day, more than this range, it may belong to abnormal hair loss. There is no need to worry about it in the short term, as it may be in the receding phase of the hair; however, if excessive hair loss occurs over a long period of time, it will belong to abnormal hair loss. 2. Changes in hair density: In the case of normal hair loss, the density of hair will not be affected because new hair will grow out while the hair is falling out naturally. However, if you find that the hair becomes obviously thin, the scalp is exposed, the hairline recedes, the hair gap becomes wider and so on, then it may belong to abnormal hair loss. 3. Other manifestations: If it is normal hair loss, usually there is no obvious change in hair quality. If it is abnormal hair loss, the hair may become soft, thin, dry and frizzy. When there is a lot of hair loss, it is recommended to go to the hospital to be examined and diagnosed by a doctor, so as to clarify the specific causes of the disease and take corresponding treatment measures.