Normal people will have hair fall every day, the number of hair fall no more than 100 a day are normal. Secondly, the girl’s hair loss is very strong may be caused by baldness, polycystic ovary syndrome, ringworm and other diseases. 1. Normal situation: normal people will appear every day to lose hair, if the number of girls lose hair for a day 100 or so, are normal, no need to worry too much. 2. Patchy baldness: the cause of the disease is not clear, mostly related to heredity, autoimmunity, endocrine disorders and other factors, the patient will appear sudden patchy hair loss. 3. Polycystic Ovary Syndrome: the cause is not clear, mostly related to genetic and environmental factors. The disease affects women of all ages, and the symptoms mainly include menstrual disorders, hair loss, acne, and so on. 4. Ringworm of the head: its cause is mostly related to the scalp being infected by dermatophytes, and patients will have symptoms such as hair loss spots, scaling, hair breakage as well as itching. There are many reasons that cause girls to lose a lot of hair, after excluding physiological factors, it is recommended that the patient go to the hospital, to clarify the cause of the disease, symptomatic treatment.