Total hair loss in girls may be caused by physiological factors, such as normal daily hair loss, postpartum hair loss, etc. It may also be caused by pathological factors, such as seborrheic dermatitis, baldness, scalp psoriasis, etc. I. Physiological factors: 1, normal hair loss: human scalp, hair follicles will be metabolized every day, hair will naturally fall off and then grow new hair, hair loss can be especially manifested in long-haired girls combing hair, but at this time the amount of hair will not be significantly reduced, is generally normal, girls keep a good rest can be, do not need to worry about; 2, postpartum hair loss: pregnant women after childbirth due to changes in hormone levels, may be A large number of hair loss phenomenon, but in the case of good postpartum recovery, the amount of hair loss will return to normal; 3, bad habits of life and diet: some girls because of excessive pressure, dieting and weight loss, perming and dyeing too much, there may be endocrine disruption, hair malnutrition, hair follicle damage and other phenomena, resulting in hair yellowing, fragile, easy to fall, hair loss and hair loss frequency increased. At this time should relax, participate in some outdoor sports, while strengthening nutrition, reduce the number of perms and dyes, may make the symptoms of hair loss reduced, restore hair volume. Second, pathological factors: certain disease factors may also lead to frequent hair loss in girls, such as seborrheic dermatitis, baldness, scalp psoriasis, etc. Patients can generally have a significant reduction in hair volume, and combined with other signs, you need to diagnose the cause according to these signs and professional examination, active treatment, in order to completely relieve the symptoms of hair loss.