Excessive facial hair, arm hair and chest hair can be a sign of hirsutism in women. Hormones (spikes of testosterone) have been noted to be a main contributing factor to hirsutism. Changes in testosterone levels happen during pregnancy, menopause or during illness, then the hair follicles are stimulated all over the body. This can lead to abnormal hair growth anywhere on the body. Another cause of hirsutism can be found in certain medications. HRT, or hormone replacement therapy, can stimulate excessive hair growth. Genetics also play a major role in female hirsutism. African-Americans and Caucasian women are in a higher percentile of having hirsutism. Hope that helps.