Medications like Antidepressant, some Antibiotics, Sleeping Medications, Hormones such as Estrogen and Testosterone, plus drugs that alter Hormone production.
Hyperprolactinemia, a condition which causes the body to produce high levels of Hormone Prolactin, responsible for producing milk in breastfeeding women even without nursing and may experience Infertility or not have their Periods
Thyroid disorders which may create an imbalance of hormones that may cause excess body hair
Some conditions that cause Hirsutism may be inherited