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Classifications for Hair Loss in Men

Male pattern baldness is the most common cause of hair loss in men, accounting for more than 95% of hair loss cases. Male pattern baldness is a type of androgenetic alopecia that causes hair follicles to shrink gradually due to genetic and hormonal factors. Hair follicles that are sensitive to dihydrotestosterone (DHT) produce hair strands that grow thinner and shorter over time until they eventually stop producing hair all together. In addition to male pattern baldness, hair loss in men can also be caused by external factors like stress, poor nutrition, or medications.

Thinning hair and hair loss in men are common occurrences, but they don't appear the same way for everyone. If you are a man, recognizing the type of male hair loss you have is a first step to determining the ideal treatment plan - a Bosley Counselor is available via an in-person and free consultation to help you understand your hair loss and treatment options. Study the illustrations and photos here to determine the classification of your hair loss. If you are experiencing hair thinning in the eyebrow area, Bosley also provides eyebrow transplantation procedures.

Male Baldness: The Norwood Scale

  • Class 1 represents a normal head of hair with no visible hair loss.
  • Class 2 is characterized by the beginning of a receding hairline and a "widow's peak" on the forehead.
  • Class 3 patients exhibit a more significant decline in hair above the temples as well as receding from the forehead. In Class 3 Vertex, hair loss is starting to become significant on the crown.
  • Class 4 hair loss may become more noticeable on the crown or patients may have significant hair loss above the temples and/or front anterior areas.
  • Class 5 hair loss approaches significant levels with most hair loss occurring on the top of the vertex and crown. Hair transplantation for this Class and higher Class levels may require more grafts to provide coverage and density.
  • Class 6 patients show major hair loss, but still have areas with donor hair available. Transplanting this hair can still have excellent results.
  • Class 7 patients show the most significant loss of hair. There may still be sufficient donor hair for transplantation; however, results may be limited.

Learn more about hair loss treatment options

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