NORWOOD SCALE FOR MALE PATTERN BALDNESS 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.

There are 2 main types of balding, anterior (front) and vertex (back), as this alternate view of the Norwood scale shows a bit more clearly.

This chart of hair loss pictures is a useful tool for diagnosis (and to avoid misdiagnosis) and for describing the extent of hair loss for treatment  purposes.

THERE ARE SEVEN LEVELS OF LOSS IN THE NORWOOD SCALE:

Norwood 1

Normal head of hair with no visible hair loss.

Norwood 2

The hair is receding in a wedge-shaped pattern.

Norwood 3

Same receding pattern as Norwood 2, except the hairline has receded deeper into the frontal area and the temporal area.

Norwood 4

Hairline has receded more dramatically in the frontal region and temporal area than Norwood 3 and there is the beginnings of a bald spot at the back of the head.

Norwood 5

Same pattern as Norwood 4 but much reduced hair density.

Norwood 6

The strip of hair connecting the two sides of the head that existed in Norwood 4 and 5 no longer exists in Norwood 6.

Norwood 7

Norwood 7 shows hair receding all the way back to the base of the head and the sides just above the ears.