The Melasma Party Nobody Invited… But Everyone Turned Up To! 🎉

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With this gorgeous (but very intense!) heatwave we are having, one of the most common skin concerns I am dealing with daily is:

“Why have I suddenly got this pigmentation?”

“Where has this brown patch come from?”

“But Alison… I wear my SPF!” ☀️

And this is where we need to have a little chat about one of the most fascinating (and sometimes frustrating) skin conditions I see…

Melasma.

Because if there is one thing I have learnt in my long career working with skin, it is that the skin is incredibly clever…

But sometimes it really does like to keep us guessing!

Pigmentation can feel like it appears from nowhere.

One minute your skin looks even and calm, and the next you notice those sneaky patches appearing across your cheeks, forehead, upper lip or hands.

So what is actually happening?

Meet your melanocytes… the little party planners of the skin 🎉

Deep inside our skin we have amazing little cells called melanocytes.

Their job is to produce melanin — the pigment that helps protect us against UV damage and gives our skin its beautiful colour.

Normally these little cells are very well behaved.

They make pigment when needed, distribute it evenly, and then go back to quietly doing their job.

But with melasma…

Something changes.

A signal is sent.

A bit like someone has put out an invitation:

“PARTY AT THE CHEEKS… EVERYONE COME OVER!”

And suddenly the melanocytes turn up with their little suitcases packed.

But they don’t just come themselves…

Oh no…

They invite ALL their friends! 😂

Before you know it, you have gone from a quiet little gathering to a full-blown rave that nobody asked for.

They bring extra pigment.

They bring chaos.

And they completely overstay their welcome.

It’s a little bit like when a teenager says:

“Don’t worry, I’m only having a few friends round…”

…and suddenly your house is full of people you didn’t invite, the music is too loud, and you’re wondering how on earth it got so out of control! 🤣

That is how melasma can feel.

Those melanocytes have made themselves far too comfortable and start producing more pigment than we actually need.

But why do melanocytes go rogue?

This is where it gets really interesting.

The honest answer?

Even scientists and skin specialists cannot pinpoint one exact reason why they suddenly decide to misbehave.

Melasma is complex.

It is a mixture of different signals happening within the skin.

We know it can be influenced by:

☀️ UV exposure

🔥 Heat

🧬 Genetics (yes, your DNA can play a part)

🧡 Hormones

🛡️ Inflammation within the skin

😬 Stress and lifestyle factors

Some people simply have melanocytes that are more reactive.

Their pigment alarm system is turned up a little higher.

It’s like having a smoke alarm that goes off because you burnt the toast…

The alarm is working, but it’s being a little dramatic! 😂

Why do some people go darker than others?

This is another question I get asked all the time.

“Why does my friend tan beautifully, but I get patches?”

Or:

“Why do some people go golden brown and I just seem to collect pigmentation?” 😂

The answer is actually another example of how clever our skin is.

Our skin colour and the way we respond to the sun is influenced by our DNA.

Different people have different types of melanocytes and different levels of pigment activity.

Some people’s skin is naturally more efficient at producing melanin when exposed to sunlight.

That melanin acts like the skin’s built-in protective umbrella.

It’s your skin saying:

“Right, sunshine detected… let’s put some protection in place.”

But for some people, those messages are stronger.

Their melanocytes respond a little more enthusiastically and produce more pigment.

So it isn’t that your skin is doing something wrong…

It’s actually doing its job very well.

Sometimes just a little too well! 😂

Why does the sun trigger melasma?

Your skin creates pigment as a protection mechanism.

When your skin detects UV exposure, it sends messages telling the melanocytes:

“Right, we need some protection here!”

So they start producing melanin.

The problem with melasma is that those messages can become exaggerated.

And it’s not just about a week on holiday.

It can be years of little exposures adding up:

🚶 Walking

🚗 Driving

🌿 Gardening

🏃 Exercising outdoors

✈️ Travelling

☀️ Sitting in the sunshine

All those small moments count.

Which is why I bang on about putting your SPF on every day ending in Y! 😂

Yes, in winter.

Yes, even if you’re not planning on going outside.

Because those sneaky UVA rays are still around — they can come through clouds and windows, quietly getting on with their job while we think we’re being sensible indoors!

Your melanocytes don’t have a little calendar saying:

“Ah, it’s winter… we can take a break now.” 🤣

They are still listening to those messages, which is why daily SPF is such an important part of protecting your skin and keeping that pigment party under control.

The sunscreen question I get asked all the time… ☀️

One question I get asked constantly in clinic is:

“Alison, what is the best sunscreen?”

And my answer is always:

“The best sunscreen is the one you are actually wearing everyday”

Because the most expensive, most talked-about SPF in the world is not helping your skin if it is sitting unopened in the bathroom cabinet looking pretty! 😂

But…

If we want to really help prevent pigmentation, support the skin and keep those melanocytes behaving themselves, then we need to look for something very important:

A broad-spectrum SPF.

Now this is where it gets a little confusing because we often just look at the number on the bottle…

But the number is mainly talking about UVB protection.

So let’s talk about the two sneaky sun rays:

UVB rays

These are the ones we usually notice first.

They are responsible for sunburn.

They are the ones that make your skin go:

“Oops… maybe that was a little too much sunshine!” 🔥

UVA rays

Then we have the quieter, deeper rays…

These penetrate deeper into the skin and are the ones we need to think about when we are talking about:

✨ Pigmentation

✨ Melasma

✨ Premature ageing

✨ Collagen breakdown

✨ Long-term skin damage

UVA doesn’t always give you that obvious red warning sign like UVB does.

It’s more like the quiet guest at the party who is causing all the trouble in the background! 😂

And for melasma, UVA is especially important because these rays can keep sending those messages to our melanocytes:

“Come on everyone… the pigment party is still going!” 🎉

A broad-spectrum SPF helps protect your skin from both UVA and UVB, which is why it is such an important part of managing pigmentation.

But what about the SPF number? ☀️

Now this is where many people get confused.

A lot of us think:

“The higher the number, the better it must be.”

And yes, a higher SPF does give more protection…

But it does not mean you are completely protected.

SPF is a measurement of how well the product protects against UVB rays — the ones that cause burning.

To put it simply:

☀️ SPF 30 filters around 97% of UVB rays

☀️ SPF 50 filters around 98% of UVB rays

So the difference is much smaller than many people think.

SPF 50 does not mean:

“I can apply it once at 8am and I’m protected all day.” 😂

Unfortunately, your sunscreen is not a magical force field!

Protection depends on:

✔️ Applying enough product

✔️ Covering all exposed areas

✔️ Reapplying regularly

✔️ Not sweating it away

✔️ Not rubbing it off

And this is especially important in hot weather.

If you are walking, exercising, travelling, gardening or enjoying the sunshine…

Your skin is warm.

You may be sweating.

You may be wiping your face.

Your protection can reduce.

So my summer rule?

If you are outside for long periods:

Reapply around every 2 hours.

And don’t forget those sneaky areas:

✔️ Hairline

✔️ Ears

✔️ Neck

✔️ Chest

✔️ Hands

Because pigmentation loves finding the places we forget! 😂

Why is melasma such a challenge?

Because treating melasma isn’t just about removing pigment.

It’s about calming the behaviour of those melanocytes.

We need to encourage them to stop overproducing pigment and stop sending out those party invitations.

Treatments and skincare can absolutely help, but the biggest success comes from understanding your own triggers.

Sometimes someone can be doing everything right…

Using great skincare.

Wearing SPF.

Looking after their skin.

But if their lifestyle involves lots of outdoor walking, travelling and sunshine, their skin may still be receiving those little pigment signals.

It doesn’t mean they have failed.

It means their skin is simply more reactive.

My final thought…

I actually love how clever our skin is.

Even when it creates something frustrating like melasma, it is still trying to protect us.

Your skin is basically running its own security system…

Sometimes the security guard just gets a little overexcited and lets everyone into the party! 😂

So to all those melanocytes gathering on the cheeks:

“Thank you for trying to protect me…

…but the rave is over, the lights are coming on, and everyone needs to go home now!” 🎉🤣

Before you go… I’d love to know…

Has this helped you understand your skin a little bit more? 🤔

Did you learn something new about melasma, pigmentation or SPF?

Because honestly, skin is fascinating (and sometimes a little dramatic 😂).

Our skin is constantly communicating with us — we just have to learn how to listen.

I would love to hear your thoughts, so pop a comment below 👇

And if you have a friend who is always asking:“Why have I got this brown patch?” or “Why won’t my pigmentation go?”…send over this blog or send them this way ❤️

Alison x