Mesure Hair Loss : The
Norwood Scale
The most well known measurement used in classifying the level of
hair loss is described as the Norwood Scale. The Norwood Scale ranges
from a level one, which is little or no hair loss, to a level 7
which is severe baldness where only a rim of hair remains. Where
you lie in the Norwood scale can help you decide which hair loss
options work best.
Prevention
is better than curing. The sooner you start treating hair loss,
the better the results.

Figure 1 : The Norwood Scale
There
are seven patterns of hair identified in the Norwood Scale:
Norwood I being a normal head of hair with no visible hair loss,
Norwood II showing the hair receding in a wedge-shaped pattern.
Norwood III shows the same receding pattern as Norwood II, except
the hairline has receded deeper into the frontal area and the temporal
area.
Type IV on the Norwood Scale indicates a hairline that has receded
more dramatically in the frontal region and temporal area. Additionally
there is a balding area at the very top center of the head, but
there is a bridge of hair remaining between that region and the
front.
Type V on the Norwood Scale shows that very same bridge between
the frontal region and the top center, also called the vertex, beginning
to thin.
Type VI on the Norwood Scale indicates that the bridge between the
frontal region and the vertex has disappeared.
Finally, Type VII on the Norwood Scale shows hair receding all the
way back to the base of the head and the sides just above the ears.
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