Girls with long beards consider genetic factors, hyperandrogenemia and polycystic ovary syndrome may be more likely, as follows: 1. Genetic factors: most of its father, mother body hair is too exuberant has a lot to do with, if the patient feels that affects the aesthetic appearance, can be diagnosed with laser hair removal treatment. 2. Hyperandrogenemia: a disease caused by excessive secretion of testosterone by female ovaries and adrenal cortex, which can lead to an increase in androgen content in the female body and the appearance of long beard. 3. Polycystic Ovary Syndrome: Polycystic Ovary Syndrome is a common reproductive endocrine metabolic disease, patients may appear hairy, long beard, acne and so on. If a girl grows a beard, it is recommended to consult a doctor in time, and after the cause of the disease is clarified, then carry out targeted treatment.