Understanding pattern hair loss

Pattern hair loss — known clinically as androgenetic alopecia — is the most common form of hair thinning in adults. It's hereditary, hormonally driven, and progressive. It is not the same as the temporary shedding you might experience after illness, childbirth, or significant stress (telogen effluvium), which usually resolves on its own over 3–6 months.

How it actually works

In genetically susceptible people, a hormone called dihydrotestosterone (DHT) gradually shrinks hair follicles in specific areas — typically the temples and crown in men, and a diffuse thinning across the part-line in women. Over time the follicles produce thinner, shorter, less pigmented hairs until they stop producing visible hairs altogether.

Why early matters

The longer a follicle has been dormant, the harder it is to bring back. Follicles that have been miniaturised for years are essentially asleep — the longer they sleep, the lower the chance they wake up. This is why dermatology consensus is to start treatment early if you're going to start at all.

What treatment can and can't do

Modern, evidence-based treatments work in two complementary ways: by reducing the hormonal driver of miniaturisation, and by extending the active growth phase of each follicle. They are most effective at preserving what you have and can produce visible regrowth in many people — but results vary, and treatment is generally lifelong because stopping reverses the gains.

When to see someone

If you're noticing a clear pattern of thinning over months rather than weeks, a doctor consultation is worth the conversation. Sudden patchy loss, scalp pain, or unusual scalp changes warrant in-person assessment instead of telehealth.

This is general health information and not medical advice. Your doctor will discuss your specific situation during a consultation.