The girl abdominal hair is not necessarily polycystic, a small amount of abdominal hair is more physiological phenomenon, if the abdominal hair is more, it may be related to genetics, drug effects, adrenal cortical hyperplasia and other factors, generally can not be through the abdominal hair a symptom to determine whether it is polycystic. 1, polycystic: polycystic that is, polycystic ovary syndrome, is a more common endocrine metabolic diseases of girls, can be due to androgen level increase It may also be accompanied by menstrual sparseness, acne, infertility and other symptoms. It is recommended that girls undergo gynecological ultrasound and other examinations, and if it is determined to be polycystic ovary syndrome, ask the doctor for treatment. Belong to the normal physiological phenomenon, most of this situation does not have other uncomfortable symptoms, generally do not need treatment. If it affects the beauty, you can go to professional medical institutions for hair removal treatment; 3, the role of drugs: girls taking some drugs for a long time, may also cause the body androgen levels rise, the side effects of abdominal hair, such as phenytoin sodium, testosterone phenylacetate, methyltestosterone, etc.. You can change the drugs or stop them under the guidance of a doctor to improve the symptoms of abdominal hairs; 4. Adrenocortical hyperplasia: For example, patients with congenital adrenocortical hyperplasia, an autosomal recessive genetic disorder, can experience an increase in androgens, causing abdominal hairs. The disease will appear early development of pubic hair in childhood, puberty or adulthood girls are mostly accompanied by menstrual disorders, hirsutism and other manifestations, can be treated with glucocorticoids, salt corticosteroids and other drugs. There are many factors that can cause girls to have long hair on their abdomen, and generally the diseases that can cause androgen levels to increase in girls’ bodies can appear girls with long hair on their abdomen.