PATIENT INFO
NORWOOD HAIR
SCALE
WHAT IS NORWOOD HAIR SCALE?
The Hamilton–Norwood hair scale is used to classify male pattern baldness. The scale uses numbers from 1 to 7. Doctors use it to determine the severity of hair loss and how to treat it. Higher numbers indicate more severe hair loss.
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7 STAGES OF HAIR LOSS
1
No significant hair loss or recession of the hairline.
2
A slight recession of the hairline around the temples, also known as an adult or mature hairline.​
3
Hair loss becomes more noticeable, prompting consideration for potential treatments. The temples recede, forming an M, U, or V shape, while balding spots emerge.
4
Hairline recession becomes more severe than in Stage 2, resulting in sparse or no hair on the vertex. A band of hair connects the two areas of hair loss to the remaining hair on the sides of the scalp.
5
Treating hair loss at this stage can be challenging as the band of hair surrounding the scalp begins to narrow, connecting to the side of the scalp.
6
The balding areas at the temples join with the balding area at the vertex. The band of hair across the top of the head diminishes or becomes sparse.
7
This stage represents the most severe level of hair loss, where the top of the head is entirely bald, and only a band of hair remains around the sides.
