Hairy fingers may be caused by physiological reasons, endocrine disorders, polycystic ovary syndrome and other factors. 1. Physiological reasons: long hair on the finger is a normal physiological phenomenon, because there are hair follicles on the finger, will produce hair, this situation is generally not much hair, is a normal phenomenon. In addition, during puberty, androgen secretion is exuberant, will stimulate the skin surface hair follicles proliferation, the phenomenon of finger hair. 2. Endocrine disorders: if long-term mental stress, bad dietary habits, etc., may lead to endocrine disorders, causing the body’s androgen secretion level is too high, the phenomenon of finger hair growth. 3. Polycystic ovary syndrome: when patients suffer from polycystic ovary syndrome, it will easily lead to changes in metabolic dysfunction, resulting in increased androgen, stimulating the growth of hair follicles, finger hair growth. If you exclude the physiological causes of hairy fingers, you should consult a doctor in time and carry out standardized treatment under the guidance of the doctor.