Four-year-old girl leg hair too much may be genetic factors, may also be the body hormone secretion disorders triggered. 1. Genetic factors, if the family population has a hairy situation, the offspring may also produce such symptoms, is generally a normal physiological response, the girl’s body basically will not have a greater impact. 2. Hormone secretion disorders, if the girl’s body hormone secretion disorders, androgen secretion exuberant, may lead to excessive hair growth, so there will be too much leg hair. If it is caused by genetic factors, generally do not need to be overly nervous, but if the body hormone secretion disorders, it is recommended to take the child to the doctor in time for examination and treatment.