Male pattern baldness stages: what each stage means for treatment

Key takeaways

• The Hamilton-Norwood scale has seven main stages, plus a "vertex" variant for crown-first thinning and an "A" variant where the hairline recedes from the front backwards.
• Stage III is the first stage doctors formally call baldness.
• The earlier the stage, the more miniaturised (shrinking but living) hair there is to save.
• Pattern hair loss is common in Indian men: an Indian population study cited in a national dermatology review found it in 58% of men aged 30 to 50.
• Your stage guides the plan, but a diagnosis also checks donor hair, family history and other causes.

Who made the scale, and why does it matter?

James Hamilton described the patterns in the 1950s, and O'Tar Norwood revised them in 1975, which is why you will see it called the Norwood or Hamilton-Norwood scale. It is used in clinics and research worldwide because it gives you and your doctor a shared language. Telling you "you are a stage III vertex" is far more useful than "you are going bald". Each stage tells me how much hair is left to protect, and whether surgery is even a sensible question yet.

See, what happens is, pattern hair loss in men is driven by dihydrotestosterone (DHT) acting on follicles that are genetically sensitive to it. Those follicles shrink over many cycles. The scale is simply a map of where that shrinking has reached.

What does each stage look like, and what does it mean for treatment?

The descriptions below follow the review of hair loss classifications by Gupta and Mysore in the Journal of Cutaneous and Aesthetic Surgery.

There is also a Type A variant, where the whole hairline moves back from front to rear without a separate crown patch, sometimes leaving scattered sparse hair in the thinning zone. It can look more advanced than its stage number, because the front is the part of the head everyone sees.

Which stage am I? A quick self-check

You cannot diagnose yourself from a chart, but you can bring me very useful information.

1. Take a photo from the front with your hair pulled back, in daylight.
2. Take a photo of your crown from above, with someone else holding the phone.
3. Find a photo of yourself from three or four years ago in similar light.
4. Note whether your father, grandfathers or uncles on either side lost hair, and at what age.

Now compare the photos. If the temples or crown look clearly different from a few years ago, the loss is active. That timing matters as much as the stage. What I tell people is this: if you have lost hair in the last three, four years, that can come back. Hair that has been gone for many years usually cannot. My article on the 5-year window explains why.

How common is male pattern baldness in India?

Common, and it often starts young. The Indian Journal of Dermatology, Venereology and Leprology's review of androgenetic alopecia cites an Indian population study of 1,005 men that found it in 58% of men aged 30 to 50. The same review notes that Indian studies found stage II, or stages II and III, to be the most common patterns. In other words, most Indian men with pattern loss are at a stage where medical treatment is still very relevant. That is good news, actually.

The American Academy of Dermatology notes it can start in the late teens or early twenties. If you are in your twenties and already at stage III, get a diagnosis early instead of waiting to see how far it goes. Read losing hair in your early 20s for a fuller guide.

What do the main treatment options do at each stage?

• Topical minoxidil can help slow loss and regrow some hair. It works best where fine hairs are still present, which means stages II to V. See minoxidil explained.
• Finasteride, a prescription tablet that lowers DHT, slows further hair loss in about 80 to 90% of men according to the American Academy of Dermatology. The StatPearls review notes it tends to work better on the crown. It needs a medical assessment first because of possible side effects. See oral treatments for male hair loss.
• In-clinic treatments, such as laser-assisted or mesotherapy sessions with growth-factor solutions, are used alongside home medicines rather than on their own.
• A hair transplant moves follicles from the back and sides to the front or crown. It does not stop the loss of the hair you already have, which is why medicines usually continue afterwards. A transplant without saving the existing hair is a bad idea. Transplants must be performed by a qualified surgeon.

All the medicines named here are prescription decisions made after assessment. Please do not start them from a chart on the internet.

Can I move back down the scale?

Sometimes, partly. If treatment thickens miniaturised hair in the crown or temples, the scalp can look like an earlier stage. But the scale measures pattern, not density, and the underlying tendency continues. The NHS is clear that the main medicines only work while you keep using them. So the realistic aim for most men is to hold their stage, or improve it a little, for as long as they choose to continue. Whether that is worth it to you is your call.

How we approach this at Dr Tvacha

We have been treating hair loss without surgery since 2007, and the stage on the scale is only one part of my assessment. At a Rs 499 hair diagnosis at our Thane, Andheri, Bandra or Dahisar centre, I check your stage, how active the loss is, the density of your donor area and your general health. If medical treatment suits you, the four-month 5-Year Time Machine Hair Plan is quoted in writing. If a transplant is worth considering, you get a written quote with a named qualified surgeon. Details are on our hair page.

Written by

Dr Amit KarkhanisAesthetic Physician · MBBS, Dip. Dermatology (UK) · Reg. No. 2001/02/1124

Founder of Dr Tvacha, practising in Thane since 2005. Leads the weight loss and hair programmes.