PCOD (Polycystic Ovary Diseases) including PCOS (Polycystic Ovary Syndrome) is the major reason women go through the facial hair trauma.
Imbalance in the menstrual cycle is a common phenomenon among girls due to the busy lifestyle and stress. The boost of male hormone in the uterus causes lumps in the ovary and this further blocks the menstrual cycle. Earlier, Women used to face such issues during menopause. Nowadays it has become common among young girls due to the change in lifestyle.
Obviously, exercise is the key. Morning walk, yoga, etc. can make a huge difference. Besides these, swimming, brisk walk, and cycling can also help and reduce not only stress but also obesity. If you include regular exercise in your regime, your menstrual cycle will never bother you, and once this remains in place, facial hair would not occur at all.