Guide
The Norwood Scale Explained
The Norwood scale is the standard 7-stage system doctors use to classify male pattern baldness. Knowing your stage tells you how far the process has progressed and, crucially, which treatments still have something to work with.
What the Norwood scale measures
Developed by James Hamilton in 1951 and refined by O'Tar Norwood in 1975, the scale runs from stage 1 (no recession) to stage 7 (extensive baldness with only a fringe remaining). It maps the two ways men typically lose hair: a receding hairline and a thinning crown, which eventually meet.
Stages 1–3: early
Stage 1 is a full head of hair. Stage 2 shows slight temple recession. Stage 3 is the first clinically significant stage — deep frontotemporal recession forming an M-shape. This is the ideal point to start medical therapy: the follicles are still present and treatment preserves the most hair.
Stages 4–5: moderate
The hairline recedes further and a distinct bald spot develops at the crown, separated from the front by a band of hair. Medical therapy still helps but won't fully reverse this; transplantation becomes a realistic option once loss is stable.
Stages 6–7: advanced
The bridge between front and crown is lost, leaving a large connected bald area with only a horseshoe fringe. Medical therapy preserves the remaining hair; restoring density requires transplantation, and donor supply becomes the limiting factor.
Frequently asked questions
What Norwood stage am I?
Compare your hairline and crown to the 7 stages: stage 1 is full hair, stage 3 shows a clear M-shaped recession, stage 4–5 adds a crown bald spot, and stages 6–7 have a large connected bald area with only a side/back fringe. Self-staging tends to be one notch optimistic, so photograph the crown under good light.
At what Norwood stage should I start treatment?
Most specialists recommend starting medical therapy (finasteride and/or minoxidil) by Norwood stage 3, when recession becomes clinically clear. Earlier treatment preserves more hair, because keeping existing follicles is easier than recovering miniaturised ones.
Can you reverse the Norwood scale?
Medical therapy can densify existing hair and produce some regrowth, but it doesn't dramatically move you back down the scale. Established baldness (Norwood 5+) rarely reverses with medication alone — a hair transplant is needed to restore density in fully bald areas.
Related reading: full research article →
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Informational only, not medical advice. Always consult a qualified clinician before starting or changing treatment.