Male pattern baldness

How common is hereditary thinning?

Alopecia UK estimates that pattern hair loss affects around half of men over 50. This includes different degrees of thinning, from a receding hairline to more extensive loss. It does not mean that half of men in that age group have lost all the hair on top of their head.

Some men notice changes in their late teens or twenties; others first become aware of them much later. Family members can develop different patterns and progress at different speeds. A relative’s hairline is useful background for a consultation, but it cannot provide a timetable for your own.

Our UK hair loss facts and statistics page looks at prevalence in more detail, including the differences between hereditary thinning, temporary shedding and alopecia areata.

What you might notice first

The pattern of change often tells you more than the number of hairs in the shower. Look at the hairline and crown over time, and note whether the scalp itself feels or looks different.

Why the hair becomes finer

Understanding your Norwood stage

The Hamilton–Norwood Scale describes the familiar combination of frontal recession and crown loss. It helps record the current pattern and compare it at later appointments.

Could it be another kind of hair loss?

“Alopecia” means hair loss; it is not a single diagnosis. Men can have more than one type at the same time. Our alopecia guide explains the wider group of conditions.

Getting the diagnosis right

A clinician asks when the changes began, whether loss has been gradual or sudden, and what you have already tried. They examine the distribution of thinning and the condition of the scalp. Family history, recent illness, diet changes and current medicines can all help explain the picture.

A close examination may reveal variation in hair thickness that is difficult to see in ordinary photographs. If the appearance is typical, a clinical examination may be sufficient. The American Academy of Dermatology describes when blood tests or a scalp biopsy may help investigate another suspected cause.

Tests should answer a clinical question. For example, symptoms or widespread shedding may prompt investigation of iron status or thyroid function. The British Thyroid Foundation explains that significant thyroid dysfunction can cause diffuse hair loss. There is no single blood test that predicts how far a receding hairline will progress.

Choosing a treatment approach

Treatment may aim to slow continuing loss, improve the thickness of existing hair or make thinning less noticeable. The choice depends on the diagnosis and your health, as well as the result you want. The clinic’s hair-loss medication page explains how a treatment review is arranged.

A Glasgow patient’s progress

These photographs from Glasgow Hair Transplant Clinics show one patient’s hairline before surgery and during recovery. The sequence follows early healing and later growth over seven months.

Your starting density, hair characteristics and donor supply affect what can be achieved. A photograph does not tell you how many grafts your own scalp needs. At a consultation, ask to see examples involving an area and pattern similar to yours and discuss the differences.

See more Glasgow before and after results.

Looking after your hair between appointments

There is no guaranteed way to prevent inherited pattern baldness. Treatment may help preserve existing hair, but a supplement, shampoo or change in hairstyle cannot remove the inherited susceptibility. An early assessment gives you time to consider the options while there is still hair to maintain.

When to arrange an assessment

Arrange a medical assessment if you notice sudden or patchy loss, a painful or inflamed scalp, eyebrow or beard changes, or unexplained heavy shedding. These features can point to a condition that needs different treatment. You can also seek advice about gradual recession at any stage if it worries you.

The NHS recommends establishing the cause of hair loss before approaching a commercial hair clinic. Where the diagnosis is uncertain, your GP may investigate or refer you to dermatology. An online photograph cannot always replace examining the scalp.

For established male pattern baldness, a transplant consultation should cover future loss as well as the current bald area. Ask what happens if the hair behind a transplanted hairline continues to thin, and what options would remain if you later wanted more treatment.

How thinning can differ in women

Men commonly develop temple recession and crown loss. Women more often notice a widening parting and reduced density over the front and top, with the frontal hairline relatively preserved. There is overlap: either pattern can occasionally occur in either sex, as Alopecia UK explains.

Both can have an inherited component, but the investigation and medication choices may differ. Treatment for one person should not be shared with a partner. Women considering surgery can read our women’s hair transplant page, which explains why donor-area assessment is especially important when thinning is widespread.

Questions about treatment and regrowth

Dr Harpreet Kalra

Dr Kalra is the surgeon at Glasgow Hair Transplant Clinics, GMC reference 7126076. A consultation considers your pattern of loss, donor hair and previous treatment before discussing the options.

Bring your questions about medication, surgical methods, recovery and cost. The plan should explain what is achievable, what the risks are and how follow-up will work. If the cause needs further investigation, that should be addressed before a procedure is arranged.