It is a normal physiological phenomenon for girls to grow a beard on their chin, but the beard will not grow too exuberantly. If the beard is too thick may be related to genetic factors, may also be due to endocrine disorders. Girls chin long beard is a normal physiological phenomenon, if the hair is more exuberant, may be congenital, can not be dealt with. When the body’s androgen secretion is too exuberant, it will cause chin beard growth. You can check the sex hormone six items to rule out polycystic ovaries and other diseases. Girls with chin beard, if it affects the aesthetic appearance, can be treated with laser. If it is caused by other diseases, the primary disease can be treated. Girls with chin beard growth can go to the hospital for diagnosis and treatment under the guidance of the doctor.