You’ve spotted hair loss somewhere on your scalp and you’re trying to figure out what it actually is. Two very different things get confused here. Alopecia areata is your immune system attacking your own hair follicles, and it can leave a coin shaped bald patch almost overnight. Male pattern baldness is genetics and hormones, slowly shrinking follicles over years until the hairline recedes or the crown thins out. Same end result on the surface. Completely different causes underneath.
Why does the difference matter? Because what you do next depends on which one you’re looking at. So let’s actually work through it.
So what exactly is alopecia areata?
Your immune system gets confused. Nobody fully knows why, but it starts treating hair follicles like something that needs to be fought off, and growth just shuts down wherever it targets.
Most men notice it as a round or oval patch, sometimes more than one, usually on the scalp but it can show up in a beard or eyebrows too. Here’s the thing that throws people off: it can happen at any age. Your teens, your twenties, doesn’t matter. And it doesn’t build up slowly the way pattern baldness does. One week your hair’s fine. Next, there’s a patch.
A few signs it’s more likely alopecia areata than pattern baldness:
- The patch has a clean, defined edge, almost too smooth to be an accident
- It showed up fast, not gradually
- It’s somewhere pattern baldness wouldn’t normally touch, like the side or back of your head
- Nobody in your family has a history of hair loss
For a lot of men, that patch just grows back on its own within a few months. No treatment needed. For others, new patches appear as old ones fill in, and a smaller number go on to lose most or all of their scalp hair (alopecia totalis) or every hair on their body (alopecia universalis). If that’s closer to your situation, we’ve written a separate guide on living with alopecia totalis that’s worth a look.
And male pattern baldness, what’s actually happening there?
Totally different mechanism. This one’s driven by DHT, a byproduct of testosterone, which gradually shrinks the follicles of men who happen to be genetically sensitive to it. Nothing shuts off suddenly. The follicles just produce progressively thinner, shorter hair each cycle, until eventually there’s nothing visible left.
The pattern, though, is predictable. A receding hairline, a thinning crown, or both, and dermatologists actually grade how far it’s gone using something called the Norwood scale. It usually starts somewhere between the late twenties and forties. Some men see it earlier. Once it starts though, it doesn’t stop by itself. That’s really the core difference right there.
How do I tell which one I’ve got?
Honestly? Shape and speed are your best clues before you’ve even booked a doctor’s appointment.
A smooth, defined patch that came out of nowhere, that’s leaning areata. A hairline that’s been slowly creeping back for a couple of years, that’s pattern baldness. One happens in days. The other happens over years.
It’s not always this clean, though. Some men get a more spread out form of alopecia areata that thins hair broadly instead of in one obvious patch, and at a glance that can look a lot like early pattern baldness starting up. Which is exactly why guessing from a mirror only gets you so far.
Can I actually have both at the same time?
Yes. More often than people assume, actually. The two conditions don’t share a cause, so being genetically wired for one does nothing to protect you from the other. Picture a man in his late thirties, already dealing with some crown thinning, who then develops an alopecia areata patch somewhere else on his scalp. Suddenly telling the two apart by eye gets a lot harder. This is usually exactly the situation where seeing a dermatologist actually earns its keep, rather than just being a formality.
Is one worse than the other?
Not medically, no. Neither one is dangerous. But they’re difficult in different ways. Pattern baldness is permanent and it progresses if you leave it alone. Alopecia areata is the opposite kind of unpredictable, it might resolve completely on its own, it might come back next year, or in rarer cases it might spread further than you expected. Which one feels worse tends to be personal rather than something a doctor can rank for you.
What actually triggers alopecia areata flare ups?
Nobody has a full answer here, and that’s frustrating if you’re the one dealing with it. There’s a genetic predisposition combined with some kind of trigger, but the specific trigger in a specific person often just isn’t identifiable. Stress gets mentioned a lot as a possible factor in people already prone to the condition. It’s not considered a root cause on its own though, and plenty of men develop patches with no obvious trigger at all.
Does pattern baldness ever just stop by itself?
It can slow down for a while. Plateau, even, for months or years. But it doesn’t reliably stop for good without some kind of treatment. Speed varies enormously between men too. Some barely notice change over a couple of decades. Others see a real shift within a handful of years. A lot of that comes down to genetics you don’t have much control over.
Should I see a GP or go straight to a dermatologist?
Start with your GP. Honestly, that’s the sensible first step either way. A GP can usually spot straightforward cases of both conditions and point you in the right direction from there. If it’s more extensive, keeps coming back, or doesn’t quite fit either typical pattern, you’ll likely get referred to a dermatologist for a closer look, sometimes with a scalp biopsy or blood tests thrown in to rule out other causes like thyroid problems or low iron, both of which can drive hair loss on their own.
What you shouldn’t do is diagnose yourself from photos online. It’s tempting, everyone does it, but getting the actual cause right is what shapes everything that happens after.
What can actually be done about either one?
This bit is a conversation for your GP or dermatologist, not something to self manage off the back of a blog post. But broadly, here’s the shape of it:
- For alopecia areata, a dermatologist might bring up corticosteroid injections directly into the patches, topical treatments, or in more extensive cases other prescription routes, all aimed at calming down the immune response
- For pattern baldness, a doctor might discuss minoxidil or finasteride, which can slow the progression and occasionally bring back some growth in follicles that have shrunk but haven’t disappeared completely
Neither one comes with guarantees. Some men respond well. Others don’t, and with alopecia areata in particular, it can return regardless of what treatment you’ve had. We’re not qualified to advise on medication, that conversation belongs with your doctor, but it helps to know roughly what’s typically on the table.
So where does a hair system actually come into this?
This is where we come in, and honestly it applies to whichever condition you’re dealing with. A system doesn’t treat the underlying cause. It’s not medical. But it also doesn’t need you to wait around and see if a patch regrows or medication works before you get your confidence back.
For pattern baldness, a system covers the crown or a receded hairline immediately, no waiting on anything else to work first. Our page on whether a hair system is worth it for male pattern baldness walks through that decision properly, and if crown thinning specifically is what you’re noticing, there’s a dedicated guide for that too.
For alopecia areata, a system can cover one patch, or several, while you and your dermatologist work out whether the hair’s coming back on its own. Some men use one for a few months as a stopgap. Others stick with it longer if patches keep returning. Our guide to living with alopecia totalis covers this in more depth for men further along with the condition.
If you’re wondering whether these things actually work in practice, or whether they’re worth the money, our pages on whether hair replacement systems work and whether they’re any good answer that honestly, including the downsides. There’s also a full breakdown of the types of hair replacement systems available and how human hair compares to synthetic, if you’re weighing that up.
What if I’d rather look at a hair transplant instead?
Some men do go that route, and it’s a fair question to ask before committing to a system. The short version is that a transplant is surgical, it’s a bigger financial and time commitment, and it depends on having enough healthy donor hair, which isn’t guaranteed with either condition, especially alopecia areata where the donor area itself can be affected. Our comparison of hair systems versus hair transplants lays out the practical differences so you’re not choosing blind.
What’s actually involved in getting fitted for one?
It starts with a proper consultation, not a hard sell. We look at where the loss is, how much coverage makes sense for you, and match hair type, colour and density so it actually looks like yours rather than an obvious add on. Our page on getting your first hair system covers what that first appointment is actually like, and our full process page runs through everything from that first meeting to fitting and the maintenance afterward.
Speaking of afterward, systems need looking after. Our guide on maintaining a hair replacement system in London covers the ongoing side of things, and if you’re curious how long one actually lasts before needing to be replaced, that’s covered here too.
Cost depends on the system and how it’s fitted. It’s all laid out on our hair system prices page, so nothing gets sprung on you halfway through.
Do you actually see men in London for this kind of thing?
Every week, at every stage of both conditions. A single areata patch someone noticed last Tuesday. Pattern baldness that’s been developing quietly for a decade. Our guide to hair replacement systems for men in London, our non surgical hair replacement page for London, and our best hair systems in London page go into what we offer locally in more detail. Our reviews page has honest feedback from men who’ve already been through it, and you can read more about who we are if that’s useful too.
Alopecia Areata & Pattern Baldness FAQs
Can alopecia areata turn into pattern baldness?
No. They are unrelated conditions. You can have both at once, which can sometimes make it look like one condition is progressing when they are actually two separate types of hair loss.
Which is more common?
Pattern baldness is much more common. Around half of men have some degree of it by age fifty, while alopecia areata affects roughly 2% of people at some point in their lives.
Does alopecia areata always grow back?
Not always. Many patches regrow within a year without treatment, but some do not, and alopecia areata can return unpredictably. A dermatologist can help you understand what is more likely in your specific case.
Does stress cause either of these?
Stress may sometimes be linked with alopecia areata flares in people who are already prone to the condition, but it is not considered the root cause. Pattern baldness is primarily influenced by genetics and hormones rather than stress. Separate stress-related hair shedding can also occur and is usually temporary.
Is pattern baldness from the mother’s side or the father’s?
Both. Pattern baldness is influenced by multiple genes, and genetic factors from either parent can play a role. It is not simply inherited from the mother’s side of the family.
Can you have patches and a receding hairline together?
Yes. Alopecia areata and pattern baldness can occur at the same time. When patchy loss appears alongside a receding hairline, it can be difficult to tell which condition is responsible for each area without a proper medical assessment.
Does shaving your head help either condition?
Not medically. Shaving does not treat alopecia areata or pattern baldness and does not change whether hair grows back. Some men choose to shave their heads as a practical or cosmetic option while deciding what to do next.
What age does pattern baldness usually start?
Pattern baldness commonly becomes noticeable from the late twenties through the forties, although it can begin earlier. Men with a strong family history may notice signs as early as their late teens or early twenties.
Can my GP diagnose alopecia areata, or do I need a specialist?
A GP can usually assess straightforward cases of alopecia areata. More extensive, unusual or uncertain presentations may be referred to a dermatologist for further assessment and treatment advice.
Is a hair system permanent?
No. A hair system is a cosmetic covering rather than a medical treatment, so it does not change the underlying cause of hair loss. It can be worn short or long term but requires ongoing maintenance and replacement over time.
Can I get a system while I’m still waiting on a diagnosis?
Yes. Some men choose to use a hair system while their medical assessment is ongoing. The system can provide cosmetic coverage day to day while the underlying cause of the hair loss is assessed separately.
Will a system look natural if my loss is patchy rather than even?
Yes. A hair system can be designed and fitted around your individual pattern of hair loss rather than using one generic shape. This allows the system to work with the natural hair that remains and create a more seamless overall appearance.See our page on a hair system for alopecia in London for how this works with patchy loss.
How fast does alopecia areata spread, if it’s going to?
There is no fixed timeline. Some men develop one patch that remains stable, while others develop additional patches over weeks or months. The course of alopecia areata varies considerably from person to person.
Do blood tests diagnose either condition?
Not directly. Blood tests may be used to rule out other possible causes of hair loss, such as thyroid problems or low iron. Diagnosis of alopecia areata and pattern baldness is usually based mainly on the appearance and pattern of hair loss.
What should I actually do first if I’ve just noticed something?
Book an appointment with your GP. Getting an early assessment can help rule out other causes of hair loss and determine whether you need referral to a dermatologist. It is better to get the pattern properly assessed than to rely on what you can see in the mirror alone.
Talk to Us About Your Options
Whether you’ve just noticed a patch, you’ve watched thinning creep in for years, or you’re still waiting on a diagnosis, we can talk through what a hair system would actually look like for your situation. Get in touch through our contact page and we’ll set up a consultation.
