Hamilton-Norwood Scale



The Hamilton-Norwood scale is a way of measuring male pattern baldness. It was introduced by Dr. James Hamilton in the 1950s and later revised and updated by Dr. O’Tar Norwood in the 1970s..

Level 1:Full head of hair with no visible signs of hair loss.

Level 2:Hair starts to recede around the frontal region of head.

Level 3:Hair recedes deeper into the frontal and temporal regions. Same pattern as Level 2, but more visible.

Level 4:Hairline has drastically receded in the frontal and temporal regions. There is beginning to show balding in the parietal region.

Level 5:The same pattern of baldness as in level 4 but there is a decrease in hair density.

Level 6:The strip of hair that once connecting the two temporal regions of the scalp is no longer visible.

Level 7:The hair has receded all the way to the occipital region of the scalp and the temporal regions no longer have hair.

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