In women, it is hormonal imbalances and certain medical conditions that lead to growth of unwanted hair. The main difference between typical hair on a woman’s body and face (peach fuzz) and unwanted hair is the texture. Excessive or unwanted hair that grows on the face, arms, back, or chest is usually coarse and dark. Unwanted hair in men is usually a hairy back and it is mainly due to genetic traits. Certain medications may cause unwanted hair growth as well.