Hair loss in girls can be caused by physiological reasons, but also by psychosomatic factors, ringworm and androgenetic alopecia and other pathological reasons. 1. Physiological reasons: hair will carry out natural metabolism every day, so hair loss is a normal physiological phenomenon, if the hair loss between 50 to 100, no need to worry. In addition, if girls often dye their hair, perm, may cause hair fragility, resulting in hair loss. 2. Pathological causes (1) Psychological factors: girls with long-term mental stress, late nights or too much anxiety can lead to seborrheic alopecia. (2) Ringworm of the head: by fungal infection can cause hair loss, but also can cause hair breakage, red spots, small pimples and other symptoms. (3) Androgenetic alopecia: usually caused by genetic factors, accompanied by symptoms such as increased oil secretion from the scalp and increased dandruff. When girls’ hair loss is serious, it is recommended to go to the hospital in time to find out the cause of the disease before treatment.