a common cause of hirsutism is polycystic ovarian syndrome pcos women with pcos and other hormone conditions that cause unwanted hair growth may also have acne problems with menstrual periods trouble losing weight and diabetesif these symptoms start suddenly you may have a tumor that releases male hormones other rare causes of unwanted hair growth may includeomen with pcos and other hormone conditions that cause unwanted hair growth may also have acne problems with menstrual periods trouble losing weight and diabetes if these symptoms start suddenly you may have a tumor that releases male hormones other rare causes of unwanted hair growth may include