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What's The Norwood Scale?

The Norwood Scale, also known as the Hamilton-Norwood scale, is a classification system used to measure the extent and pattern of male pattern baldness (androgenetic alopecia). It helps professionals and clients understand how far hair loss has progressed and is often used to determine appropriate treatment options—including scalp micropigmentation (SMP), hair transplants, or medication.

 

Norwood Scale Stages:

1. Stage 1: Minimal or no recession of the hairline. Normal hair density.

2. Stage 2: Noticeable thinning at the temples. Early signs of a receding hairline.

3. Stage 3: Deepening recession in the temple areas, often forming an “M” shape.

4. Stage 3 Vertex: Similar hairline recession as Stage 3, but also includes thinning or balding at the crown (top/back of the scalp).

5. Stage 4: More significant hairline recession and larger bald spot at the crown, but still separated by a band of hair.

6. Stage 5: The hair between the receding hairline and crown becomes thinner, and the two areas start to merge.

7. Stage 6: The bald areas in front and crown are connected, leaving only a thin band of hair around the sides.

8. Stage 7: The most advanced stage—only a horseshoe-shaped ring of hair remains around the sides and back of the head.