Symptoms:

The typical pattern of male baldness begins at the hairline. The hairline gradually moves backward (recedes) and forms an "M" shape. Eventually the hair becomes finer, shorter, and thinner, and creates a U-shaped (or horseshoe) pattern of hair around the sides of the head.

Signs and tests:

Classic male pattern baldness is usually diagnosed based on the appearance and pattern of the hair loss.

It is important to note that hair loss may be due to other conditions. This may be true if your hair loss occurs in patches, you shed a lot of hair, your hair breaks, or you have hair loss along with redness, scaling, or pain.

A skin biopsy or other procedures may be needed to diagnose other disorders that cause hair loss.

Hair analysis is not accurate for diagnosing hair loss due to nutritional or similar disorders. However, it may reveal substances such as arsenic or lead.