• Excess facial hair is due to an increase in androgen production.blonde girl facial massage image by Anatoly Tiplyashin from Fotolia.com
  
  Facial hair growth is an unsightly rite of passage for most women. Due to hormonal changes and the aging process, the ratio of male androgens in the body is higher than a woman's normal estrogen levels. As a result, excess facial hair is produced. Excessive facial hair growth can also be a sign of an underlying medical condition. If you have concerns, visit a doctor to determine a possible medical cause and treatment plan before applying over-the-counter hair-removal methods.
  
  

Heredity

• According to CNN,"If your mother or father developed thick facial hair, there's a chance that you will too." The CNN experts also report that some women's facial hair may thicken due to the distribution of follicles influenced by heredity. Some families and ethnic groups have dense and excess facial hair growth due to a genetic predisposition, as stated by the Mayo Clinic.
  
  

Polycystic Ovarian Syndrome

• An increase in androgen production, and subsequent facial hair, may be linked to an underlying medical condition called polycystic ovarian syndrome (PCOS). According to the Mayo Clinic, "Infrequent or prolonged menstrual periods, excess hair growth, acne and obesity can all occur in women with polycystic ovary syndrome."
  
  

Natural Aging Process

• All women have normal levels of androgens, or male hormones, in their bodies. According to Epigee, as women grow older and enter menopause, a woman's body produces more androgens.The increase of these male hormones may cause an increase in hair growth on the upper cheeks, chin, upper lip, and neck area.