Male hair loss and going bald is a fact of life for millions of men. Significant male pattern baldness affects the lives of well over one-third of adult men worldwide. There are many possible causes of hair loss in men, however, the man who experiences hair loss usually finds that it is part of his individual genetic makeup. ANDROGENETIC ALOPECIA is the most common cause of hair loss and balding in men. It represents almost 95% of all male hair loss. Other types of male hair loss include: Alopecia areata: Generally thought to be an autoimmune disorder. Causes “patchy” hair loss, often in small circular areas in different areas of the scalp. Alopecia totalis: Total hair loss of the scalp, (an advanced form of alopecia areata). Alopecia universalis: Hair loss of the entire body, (also an advanced form of alopecia areata) Trichotillomania: Compulsive hair pulling.