Girls abdominal hair is not necessarily polycystic, may also be a normal physiological situation or adrenal cortex hyperplasia. 1. Physiological situation: if the parents of the abdomen and other places of body hair is obvious, then the girl body hair is more luxuriant, consider with genetic factors, this time is considered to be physiological factors. 2. Polycystic ovary syndrome: For women with polycystic ovary syndrome, it is often combined with endocrine changes such as elevated levels of androgens, which can lead to hirsuteness, acne and other skin changes, but the patient usually comes to the hospital with clinical manifestations such as menstrual irregularities or infertility. 3. Adrenocortical hyperplasia: For patients with congenital adrenocortical hyperplasia, this disease is an autosomal genetic disease, at this time the patient will have an increase in body hair, early development of pubic hair and other manifestations. For women with abdominal hair, it is recommended to go to a regular hospital to improve the sex hormones and other related examinations, and to clarify the cause of the disease and then actively treat it under the guidance of the doctor.