Little boy long beard may be due to puberty to, this is a normal physiological phenomenon, generally do not need special treatment to remove. But if it is polycystic ovary syndrome, precocious puberty and other causes, usually need medication. 1. Physiological factors: if it is a boy, in puberty began to grow a beard is a normal phenomenon, which marks the beginning of the development of the child’s secondary sexual characteristics, do not need to worry too much, and do not need to shave too early. 2. Polycystic ovary syndrome: If a girl grows a beard, it may be caused by polycystic ovary syndrome. This is due to endocrine disorders, hyperandrogenemia caused by the need for polycystic ovary syndrome treatment, you can follow the doctor’s instructions oral dydrogesterone, estradiol and other drugs for treatment. 3. Precocious puberty: boys under 9 years of age with a long beard may be due to precocious puberty, treatment can be used to promote gonadotropin-releasing hormone analogues, such as treprostinil, leucovorin and other medications for treatment, in addition to life should pay attention to a light diet, more exercise, to avoid obesity. In addition to the above factors, children with long beards may also be caused by other diseases, it is recommended to seek medical advice as soon as possible, to the regular hospital to find out why, so as not to delay the condition.