Hair loss for men can occur in many ways and at any age. Hair loss for men called premature alopecia occurs in 5% of the male population and will cause a guy to start losing his hair before he is 20 years old. Hair loss for men is typically genetic and medically referred to as androgenic alopecia. Sometimes hair loss for men occurs in big patchy bald spots called “spot balding” or alopecia areata. This form of hair loss is less common, but can affect the entire body as well as the head. While you may feel alone around 60 million men and women suffer from hair loss.