Understanding what's happening with your hair, why it's happening, and what you can realistically do about it — without the noise. This guide covers everything from the biology of hair loss to the Norwood scale, the difference between thinning and shedding, and when it's worth seeking specialist help.
What Causes Male Hair Loss
For the vast majority of men, hair loss comes down to one thing: genetics and a hormone called DHT. Understanding this isn't just academic — it's the foundation of every effective treatment decision.
Androgenetic alopecia — commonly known as male pattern hair loss — accounts for approximately 95% of hair loss in men. It's hereditary, progressive, and driven by a sensitivity of the hair follicles to dihydrotestosterone, or DHT.
DHT is a byproduct of testosterone. In men who are genetically predisposed, DHT binds to receptors in the hair follicles and gradually causes them to shrink — a process called miniaturisation. Over time, affected follicles produce progressively finer, shorter hairs until they eventually stop producing hair altogether.
The pattern of loss — receding temples, thinning crown, or a combination — is largely determined by which follicles carry that genetic sensitivity. You may have inherited this from either side of your family, not just your maternal grandfather as the old myth suggests.
The key distinction: DHT does not kill follicles immediately — it miniaturises them over time. This is why early treatment, which targets the follicle before significant miniaturisation has occurred, consistently produces better results than treating advanced loss.
Other causes of hair loss — including stress, illness, nutritional deficiency, thyroid conditions, and certain medications — exist and are worth ruling out, particularly if your loss is sudden, patchy, or accompanied by other symptoms. A trichology consultation can help identify whether your loss is pattern-related or has another underlying cause.
The Stages of Hair Loss — The Norwood Scale
The Norwood scale is the most widely used classification system for male pattern hair loss. It runs from Type I to Type VII and provides a common language for describing and discussing the extent of loss — useful both for understanding your own situation and for planning treatment.
A full hairline with no visible recession. An ideal time to consider preventative treatment if there is a family history of loss.
Slight recession at the temples. Often dismissed as normal ageing — but this is when treatment is most effective.
Clearly defined recession at the temples. The hairline begins to take on an M-shape. Still highly treatable.
More significant frontal recession combined with thinning at the crown. A band of hair remains between the two areas.
The band between the frontal and crown areas begins to narrow. Loss is now more extensive and treatment options begin to narrow.
The frontal and crown areas have merged. Only a horseshoe of hair remains around the sides and back of the head.
The most advanced stage. Only a thin band of hair remains. Regenerative treatments have limited effect at this stage.
Most men who seek help are somewhere between Norwood II and V — the range where non-surgical treatments are most effective and where acting sooner rather than later makes the most meaningful difference to outcomes.
Worth knowing: The Norwood scale describes pattern, not speed. Some men move through the stages quickly; others plateau for years. There is no reliable way to predict how quickly your loss will progress without proper clinical assessment.
The Difference Between Thinning and Shedding
These two terms are often used interchangeably but they describe very different things — and understanding the distinction matters when it comes to identifying the right treatment.
Thinning refers to the miniaturisation process described above — where individual hairs gradually become finer, shorter, and less pigmented before eventually disappearing. It tends to be a slow, progressive process concentrated in specific areas of the scalp. This is the hallmark of androgenetic alopecia.
Shedding — known clinically as telogen effluvium — is a different process entirely. It refers to an accelerated loss of hair across the whole scalp, often triggered by a specific event such as physical illness, surgery, a period of severe stress, significant weight loss, or hormonal change. It can be alarming because the volume of hair lost feels sudden and dramatic.
The critical difference is that shedding is usually temporary and reversible once the underlying trigger is resolved. Thinning from androgenetic alopecia is progressive and will not reverse on its own.
A useful question to ask yourself: Are the hairs falling out full-length and full-thickness, or are they noticeably finer than before? Full-length shedding suggests telogen effluvium. Fine, short hairs suggest miniaturisation and androgenetic alopecia — the type that responds best to early clinical treatment.
In some cases, both processes happen simultaneously — for example, the stress of illness triggers a shed on top of an underlying pattern loss. A trichology assessment can help separate the two and give you a clear picture of what you're dealing with.
Why Early Action Produces Better Results
This is perhaps the single most important thing to understand about hair loss treatment — and the reason HHR exists.
The follicle miniaturisation process is progressive but not immediately permanent. In the early stages, a follicle that has shrunk can still be stimulated to produce healthy hair again. Once miniaturisation is complete and the follicle has become truly dormant, regenerative treatments have very limited effect.
Think of it like this: treating a follicle that is weakening is like treating a patient who is unwell. Treating a follicle that has completely stopped producing hair is like treating one that has already gone. The window of genuine opportunity is real, and it closes gradually over time.
What this means in practice:
- A man who starts a medically supervised programme at Norwood II will almost always have a better outcome than one who starts at Norwood IV with the same treatment
- PRP and exosome therapy work by stimulating and supporting follicles — they need living follicles to work with
- The earlier you act, the broader your range of options — including less intensive and less expensive treatments
- Stabilising loss early is far more achievable than trying to reverse advanced loss
Most men who come to us say the same thing: "I wish I'd done this sooner." Not because treatment is difficult or invasive — but because they waited until the options had already narrowed. Acting early is not vanity. It is sound clinical judgement.
Debunking Common Myths
Hair loss is surrounded by more myth and misinformation than almost any other health topic. Here are the most common ones — and the truth behind them.
Wearing hats causes hair loss
There is no clinical evidence that wearing hats causes or accelerates hair loss. A hat would need to be tight enough to significantly restrict blood flow to the scalp — which is not the case with normal headwear. If you've been avoiding hats, you can stop.
You inherit hair loss from your mother's father
The gene most associated with androgenetic alopecia is indeed on the X chromosome — which you receive from your mother. But multiple genes across multiple chromosomes contribute to hair loss, meaning it can come from either side of your family. Your father's hairline is also relevant.
Washing your hair too often causes it to fall out
Washing your hair does not cause hair loss. You may notice more hairs in the shower after going longer between washes — but this is simply hairs that had already naturally shed collecting together. The frequency of washing has no effect on the rate of follicle miniaturisation.
Stress causes hair loss
Severe or prolonged stress can trigger telogen effluvium — a temporary shedding phase — but it does not cause androgenetic alopecia. If you experienced a stressful period and your hair thinned, this is likely a separate process from pattern hair loss. Stress-related shedding usually resolves once the underlying cause is addressed.
Hair loss only happens to older men
Around 25% of men who experience male pattern hair loss begin to notice it before the age of 21. By the age of 35, approximately two-thirds of men have some degree of measurable loss. Hair loss is not a condition of old age — it is one of the most common conditions in men of all ages.
There's nothing you can do about it
This is perhaps the most damaging myth of all — and the one most responsible for men waiting too long. Evidence-based, clinically supervised treatments exist that can slow or halt progression, stimulate regrowth, and in many cases significantly improve density. The options available today are considerably more effective than they were even a decade ago.
When to Seek Specialist Help
There is no single moment that defines the right time to seek help — but there are clear signals worth paying attention to. The most important thing to know is that earlier is almost always better, and a consultation does not commit you to anything.
Consider seeking a specialist assessment if:
- You have noticed your hairline receding, even slightly, over the past 12 months
- Your hair feels or looks noticeably finer than it used to
- You find yourself adjusting how you style your hair to cover areas of thinning
- You have a family history of significant hair loss and want to act before it progresses
- You experienced a period of sudden or diffuse shedding that has not resolved
- You are currently using online pharmacy medications with no clinical supervision
- You have had a hair transplant and want specialist aftercare to protect your results
You do not need to be at an advanced stage to benefit from a consultation. In fact, the earlier you understand your situation, the more options you have — and the more control you retain over how your hair loss progresses.
At HHR, every client begins with a trichology consultation. This is a thorough clinical assessment of your scalp and hair loss pattern — not a sales conversation. You will leave with a clear, honest picture of what is happening, what is possible, and what we would recommend. There is no obligation to proceed with any treatment. The consultation fee of £75 is deducted in full from any advanced treatment plan booked as a result.