Male pattern baldness (Androgenis Alopecia) is the most common type of hair loss in men.
Male pattern baldness is related to your genes and the male sex hormone testosterone. The pattern is the classic receding hairline and hair thinning on the crown.
Each strand of hair you have sits in a tiny hole in the skin called a follicle. Over time the follicle shrinks, resulting in shorter and finer hair, and eventually baldness when the follicle no longer grows new hair. The follicles do remain alive though, which suggests that it is still possible to grow new hair.
The hairline is the first place to show signs of Male Pattern Baldness, gradually receding and begining to form an “M” shape. Eventually the hair becomes finer, shorter, and thinner, and, in developed Male Pattern Baldness, creates a U-shaped (or horseshoe) pattern of hair around the sides of the head. Classic male pattern baldness is usually diagnosed based on the appearance and pattern of the hair loss.
Hair loss may be due to other conditions. This may be true if hair loss occurs in patches, you shed a lot of hair suddenly, your hair breaks, or if you have hair loss in addition to redness, scaling, or pain.
Further tests are needed if you suspect your hair loss is caused by something other than Male Pattern Baldness.