what cause your hair to fall out
Hair loss that is genetic is known as androgenetic alopecia and, according to the American Academy of Dermatology, is the most common cause of hair loss. The gene can be inherited from either your mother's or father's side of the family, though you're more likely to have it if both of your parents had hair loss.
1 Having inadequate protein or iron in your diet or poor nourishment in other ways can cause you to experience hair loss. Fad diets, crash diets and certain illnesses, such as eating disorders, can cause poor nutrition.  Medications.