Perimenopause, Chafing and the Skin Nobody Warns You About
You have run this route a hundred times. Same kit, same distance, same everything. So why are you suddenly finishing with a raw bra line, a blister where you have never had one, and inner thighs that sting in the shower?
It is not your imagination and it is not that you have gone soft. Your skin has changed, and hardly anyone connects it to your hormones.
Here is what perimenopause does to your skin, why it turns long sessions into a chafing minefield, and the simple fixes that sort it out.
Perimenopause thins your skin and dries it out, and thin, dry skin chafes. You have not changed your training. Your skin has changed under you.
Oestrogen keeps your skin thick, hydrated and springy. As it falls, the skin loses collagen, moisture and resilience. For a woman clocking up hours in sweaty kit, that is a recipe for rubbing, blisters and grazes that take an age to heal.
What is actually happening to your skin
Oestrogen does a lot of quiet work on your skin that you never noticed until it started to leave.
Collagen. Oestrogen supports collagen, the scaffolding that keeps skin thick and firm. Studies commonly cite a loss of up to around 30 percent of skin collagen in the first five years after menopause, with a steadier decline after that. Less collagen means thinner, more fragile skin.
Moisture. Oestrogen helps your skin hold water and produce the oils that keep it supple. As it drops, skin gets drier and the protective barrier weakens. Dry skin has less give, so it rubs rather than glides.
Healing. Lower oestrogen slows wound healing. That is why a graze or a bit of chafe that used to clear up in a couple of days now hangs around for a week and threatens to get sore.
Sensitivity. Many women notice their skin becomes more reactive, more prone to heat rash, itching and irritation, and quicker to burn in the sun. Long hours outside expose all of it.
There is also a cruel bit of timing here. Perimenopause often lands in your forties and fifties, exactly when many women finally have the time and headspace to train seriously again. The kids are older, the career is settled, the goals get bigger. And just as you commit to longer sessions and bigger races, your skin becomes less able to cope with them. It feels unfair because it is. But it is entirely manageable once you know what you are dealing with.
None of this means your endurance days are over. It means the low-friction margin you used to have is gone, and you need to build it back in on purpose.
Where it shows up first
Chafe and skin trouble tend to hit the same spots for endurance women. Knowing your danger zones is half the battle, because these are the places to protect before every long session rather than after. Have a quick look at your own map. Most women already know exactly where they rub if they stop and think about it.
- Bra line and underboob. Sweat pools, the band moves, and thinner skin gives way. A bra that was fine last year can shred you this year.
- Inner thighs. The classic. Skin on skin, plus sweat and salt, over thousands of strides.
- Waistband and seams. Leggings, shorts and race belts that sat happily now leave a red line.
- Nipples. Yes, for women too, especially in a wet top over a long run.
- Feet. Drier skin and slower healing turn a small hotspot into a blister that ends your week.
- The saddle. For cyclists and triathletes, thinner skin makes saddle sores more likely and slower to settle.
Heat and humidity pour petrol on it
If you train somewhere hot and humid, and plenty of my athletes do, you are playing this game on hard mode. Heat means more sweat, more salt on the skin, and kit that stays wet for the whole session. All three ramp up friction.
Sweat is not just water. It carries salt, and as it dries it leaves fine, gritty crystals on your skin and in your kit. That grit sits right in your chafe zones and sands away at already fragile skin. On a two-hour humid run, you are effectively rubbing your inner thighs with very mild sandpaper the whole way round.
Humidity also means your sweat does not evaporate well, so you stay soaked. Damp skin is softer and more easily damaged than dry skin, which is why long, sticky sessions produce chafe that a cool, dry day never would. The answer is not to train less. It is to prepare your skin and kit properly, then get clean and dry quickly afterwards.
The mistakes that make it worse
Most chafing is not bad luck. It is a handful of habits that quietly stack the odds against you.
Assuming your trusty bra, shorts and socks are still fit for the job. Elastic wears out, seams degrade, and your skin is less forgiving than it was. Kit that was fine at 40 can be a problem at 48. Reassess it.
Sitting around in a sweat-soaked top after a session, or leaving damp cycling shorts on for an hour post-ride. Wet, salty fabric against fragile skin is how a minor rub becomes a raw, angry patch.
Only reaching for the anti-chafe balm once you already have a sore spot. Friction damage is far easier to prevent than to heal, especially when healing is now slower.
Treating dry, thirsty skin as cosmetic and nothing to do with performance. Well-hydrated, moisturised skin is more resilient skin. It genuinely rubs less.
Think of it as three layers, from the skin out:
- Skin. Keep it moisturised day to day and well hydrated from the inside. Resilient skin resists friction.
- Barrier. Apply an anti-chafe balm or lubricant to your danger zones before every long session, not after.
- Kit. Choose well-fitting, moisture-wicking, seamless or flat-seam kit that moves with you, not against you.
Get all three right and most chafing simply stops happening.
What actually works
These are the fixes I hand my athletes when the skin changes start to bite. None of them are complicated. All of them work. The trick is doing them every time, not just after a bad day has reminded you. Build them into your pre-session routine the same way you lace your shoes, and chafe stops being a thing that happens to you.
An anti-chafe balm or a good old-fashioned lubricant on your inner thighs, bra line, waistband and anywhere else that rubs. Apply before you start, and reapply on very long or very hot sessions. This is the single biggest win.
A well-fitting, supportive, moisture-wicking sports bra with soft or flat seams is worth every penny. Replace tired elastic. Look for seamless shorts and socks. If a seam sits on a danger zone, that garment is retired.
Change out of sweaty clothes as soon as you can. Rinse off the salt. For cyclists, do not linger in the chamois. Clean, dry skin heals and holds up far better than skin left to marinate in sweat.
Moisturise regularly, drink enough, and protect yourself from the sun on long days out. If you are exploring HRT for other menopause symptoms, better skin resilience can be a welcome bonus, though that is a conversation for your GP.
One rule ties all of this together: test it in training, never on race day. A new balm, a new bra, a fresh pair of shorts, all of it gets trialled on a normal long session first. Race day is not the time to find out that your shiny new kit rubs. Sort your comfort setup in training and it becomes one less thing to think about when it matters.
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The saddle deserves its own paragraph, because it is where thinner skin causes the most misery. A saddle sore in perimenopause can take you off the bike for a fortnight, and if it settles into something deeper it can be a real problem.
Use a good chamois cream every ride, no exceptions on the long ones. Make sure your shorts are current and fit properly, because a worn or ill-fitting pad rubs in exactly the wrong place. Get out of the chamois the moment you are off the bike, wash, and let the skin breathe and recover. If your saddle position has never been checked, a proper bike fit can take pressure off the soft tissue that suffers most. This is not being precious. It is protecting the skin so you can keep riding.
Treating chafe once it has happened
Prevention wins, but sometimes the damage is done. When it is, treat it properly rather than gritting your teeth and hoping it sorts itself out. With slower healing on your side of the ledger now, a rushed or ignored sore is what turns a lost session into a lost fortnight.
- Clean the area gently and keep it clean.
- Let it breathe where you can, and keep it protected where kit will rub it again.
- Use a simple barrier or healing balm to stop it drying and cracking.
- Give it time. Slower healing is real now, so do not keep reopening a raw patch by charging back into the same friction.
- If skin breaks down, weeps, spreads or looks infected, get it seen. Fragile skin can turn a small problem into a proper one.
This is not vanity, it is performance
It is easy to feel daft raising chafe and dry skin when you are trying to be a serious athlete. Do not. A raw bra line that stops you sleeping, a blister that costs you a long run, a saddle sore that keeps you off the bike for a fortnight. These are performance problems. They break your consistency, and consistency is what makes you strong.
Looking after your skin is not fussing. It is the same as looking after your bones or your fuelling. It is one more part of the body that changes through perimenopause, and one more part you get to manage well instead of suffering through.
The women who handle perimenopause best are the ones who stop treating each new niggle as a sign they are past it, and start treating it as information. Thinner skin is information. It tells you to change your kit and your prep, not to change your goals. Do that, and the goals stay firmly on the table.
Sort the friction, protect the skin, and get on with the training you actually came here to do.
- ✓Chafing, blisters or saddle sores have crept in where you never used to get them
- ✓Your skin feels drier, thinner or more easily irritated on long days
- ✓Grazes and sore spots take much longer to heal than they used to
- ✓You want a training and kit setup built around the body you have now
If that is you, let us build you a plan that fits, comfort and all.
I coach endurance women through the real, unglamorous parts of perimenopause, from chafe to fuelling to bone health, so nothing small keeps knocking you off your training.
Apply to work with meFrankie x
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I coach women through running, triathlon and nutrition. Two-minute application, and I read every one myself.