The 7 Stages of the Norwood-Hamilton Scale for Male Pattern Hair Thinning

The Norwood-Hamilton scale is the trusted tool for assessing male pattern hair loss (androgenetic alopecia) and predicting its progression.

Stage 1: No Hair Loss

At this stage, there’s no visible hair loss. The hairline around your face, mirrors your adolescent hair, whether a higher or lower hair line. No treatment is necessary, but maintaining scalp health is always a good foundation.

Stage 2: Early Recession

Slight hairline recession begins, typically at the temples, forming a more “mature” hairline. Thinning at the crown may also start.

Stage 3: Noticeable Hair Thinning

Hair loss becomes more apparent at the frontal hairline or vertex.

• Stage 3 Vertex: Thinning primarily affects the crown.
• Stage 3A: The frontal hairline recedes further, exposing the temples.

Stage 4: Advanced Hair Loss

Significant thinning appears, leaving a narrow band of hair connecting the sides of the scalp.

Stage 5: Significant Balding

Hair loss becomes severe, leaving a thin strip of hair at the back and sides.

Stage 6: Classic Baldness

The crown and frontal areas are mostly bald, with only a thicker band of hair remaining at the back and sides. While transplants can still yield impressive results, ongoing therapies are vital to preserve both transplanted and natural hair, preventing the need for multiple procedures.

Stage 7: Complete Balding

The top of the head is entirely bald, with thin hair remaining at the sides and back. Hair transplants are still an option but with very thin hair may require high skill, planning and a higher number of grafts.

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