If you've ever experienced thrush, bacterial vaginosis (BV) or frequent irritation, you've probably searched for ways to reduce the chances of it happening again.
One piece of advice comes up time and time again:
Wear cotton underwear.
But why?
Can the fabric you wear really make a difference?
Why Fabric Choice Matters
The vulval area is naturally warm and can become even warmer during exercise, hot weather or long days in tight clothing.
When heat and moisture become trapped, it creates an environment where yeast and bacteria can thrive more easily.
That's why many gynaecologists recommend choosing breathable cotton underwear over synthetic fabrics, particularly if you're prone to irritation or recurrent infections.
Cotton Helps Keep the Area More Breathable
Cotton is a natural fibre that's known for its breathability.
Unlike many synthetic fabrics, cotton allows air to circulate more freely and helps reduce heat and moisture build-up.
While no underwear can prevent infections, creating a cooler, drier environment is one reason cotton is often recommended by healthcare professionals.
Cotton and Thrush
Thrush is a common yeast infection caused by an overgrowth of Candida, a yeast that naturally lives in the body.
Warm, moist conditions can encourage yeast to multiply.
This is why many healthcare professionals advise wearing loose-fitting clothing and breathable cotton underwear if you're prone to recurrent thrush.
Cotton won't treat thrush, but it may help reduce some of the conditions that yeast prefers.
Cotton and Bacterial Vaginosis (BV)
Bacterial vaginosis happens when the natural balance of bacteria in the vagina changes.
There are many factors that can contribute to BV, and underwear alone is not considered a cause.
However, because cotton is breathable and comfortable, many gynaecologists recommend it as part of good vulval care, alongside avoiding heavily fragranced products and maintaining healthy hygiene habits.
What About UTIs?
Urinary tract infections are usually caused when bacteria enter the urinary tract.
They're not caused by the type of underwear you wear.
However, staying dry and changing out of damp workout clothes promptly can be sensible habits, and breathable cotton underwear may help you feel more comfortable throughout the day.
Other Tips Gynaecologists Commonly Recommend
If you're prone to irritation or recurrent infections, many healthcare professionals also recommend:
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Choosing breathable cotton underwear.
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Changing out of sweaty gym clothes as soon as possible.
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Avoiding heavily fragranced soaps and intimate products.
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Sleeping without tight-fitting clothing when practical.
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Wearing clothing that allows air to circulate.
If you experience persistent or recurring symptoms, it's important to speak with your GP or another qualified healthcare professional for personalised advice.
Choosing Comfort Every Day
Your underwear won't solve every health concern.
But choosing breathable, comfortable cotton is one simple step that supports everyday comfort and aligns with advice commonly given by many gynaecologists.
At Cotton Coup, we believe the clothing closest to your skin should help you feel fresh, comfortable and confident—whether you're heading to the gym, travelling, working or simply going about your day.
Sometimes, the smallest everyday choices can make the biggest difference to how comfortable you feel.