A girl’s body hair is particularly hairy may be genetic, endocrine disorders and other factors. 1. Heredity: there is a certain family genetic factor of body hair, if the parents have a lot of body hair, the girl may have excessive body hair phenomenon, there are no other clinical symptoms. 2. endocrine disorders: for example, polycystic ovary syndrome, the existence of polycystic ovary syndrome, will have an impact on the body’s hormone level changes, resulting in increased body hair, may also appear menstrual disorders, and in severe cases will even cause female infertility. If a woman has a lot of hair on her body, it is recommended that she seek medical examination to determine the cause of the disease and then under the guidance of the doctor to carry out reasonable treatment.