WHY HAIR GOES. AND WHY THE PATTERN MATTERS.
Most hair loss in men is hereditary and harmless. The exceptions are the point.
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Most men who lose hair lose it in a pattern: the temples go back, the crown thins, and the two meet in the middle over years. That pattern is hereditary. It is not a disease, it does not mean anything else is wrong, and whether to do something about it is entirely your call.
The GP looks at the pattern first because the exceptions look different. Hair that comes out suddenly, in patches, or all over. A scalp that hurts, flakes or has sores. Loss that started with an illness, a new medicine, a crash diet or a very bad year. These are not hereditary loss and they are worth finding, because some of them have a cause that can be fixed, and a few need a doctor to look at the scalp in person.
That is why the Hair programme asks for photos in daylight and a few questions about your family, your health and what you have already tried. The GP is not checking whether you are bald enough. The GP is checking whether this is the ordinary kind.
If it is, you get a straight answer about what is realistic for your pattern, which is usually keeping what is there rather than getting much back. If it is not, you get told what it probably is instead.
An independent GP decides. A licensed pharmacy dispenses. Frankly organises and follows up.