There’s nothing like cooling off in the water on a hot summer day. Swimming offers exercise, relaxation, and fun all in one. But for many women, it also comes with an unwelcome risk: urinary tract infections (UTIs).
UTIs are more than a nuisance. They’re painful, disruptive, and—if untreated—can lead to more serious complications. Understanding how swimming contributes to UTIs can help women take steps to reduce their risk and enjoy the water worry-free.
UTIs: A Widespread Concern
Urinary tract infections are one of the most common health issues women face. Globally, UTIs are the most common bacterial infections and the second most common infection overall (NCBI).
~60% of women will experience at least one UTI in their lifetime (NIH)..
The recurrence rate is high—once you’ve had one, you’re more likely to get another.
Infections are especially common in younger women, older women, and anyone with a history of frequent UTIs.
While men can get UTIs, they’re far less common due to anatomical differences. For women, the shorter urethra and its proximity to the vagina and anus mean bacteria have a much shorter journey to the bladder.
What Causes UTIs?
The vast majority of urinary tract infections are caused by Escherichia coli (E. coli)—a bacterium that normally lives in the intestines without causing harm. But when E. coli migrates to the urethra and bladder, it can trigger infection.
Common pathways for bacterial entry include:
Sexual activity (friction introduces bacteria to the urethra)
Poor hygiene practices (like wiping back to front)
Wearing damp clothing (bacteria thrive in moist environments)
Swimming (exposure to contaminated water or prolonged time in wet swimsuits)
The Swimming–UTI Connection
Swimming isn’t inherently harmful, but it does introduce specific risk factors for UTIs.
1. Contaminated Water
Even treated pools aren’t sterile. In fact, a CDC study found that E. coli was present in 58% of pool water samples. This bacteria enters the water primarily from swimmers themselves.
While chlorine kills many pathogens, it doesn’t work instantly—and improper pool maintenance can allow bacteria to persist. Natural bodies of water—lakes, rivers, and oceans—are even riskier. Research shows that women who swim in natural waters have 3.4 times higher odds of developing a UTI compared to those who don’t (ScienceDirect).
2. Damp Swimsuits
After swimming, many women stay in wet swimwear for hours. That warm, moist environment is the perfect breeding ground for bacteria. Combine this with the short distance between the urethra and anus, and the odds of bacterial migration increase significantly.
3. Seasonal Influence
UTIs are more common in summer, when swimming is more frequent. One study confirmed that UTI incidence rises significantly during warmer months (NCBI). Heat, sweating, dehydration, and recreational water exposure all contribute.
4. Mechanical Irritation
Swimming itself involves movement, friction, and pressure from tight swimwear. This mechanical stress can make urethral tissue more vulnerable, increasing the risk of bacteria taking hold.
Symptoms of a UTI
Recognizing the signs of a urinary tract infection early helps ensure prompt treatment. Common symptoms include:
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Burning sensation when urinating
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Frequent or urgent need to urinate
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Passing only small amounts of urine
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Cloudy or foul-smelling urine
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Pelvic pain or pressure
If untreated, UTIs can spread to the kidneys, leading to fever, back pain, and more serious complications.
Preventing UTIs When Swimming
Swimming is too beneficial and enjoyable to give up entirely. Instead, prevention is key. Here are steps women can take to reduce their risk:
1. Shower Before and After Swimming
Rinsing before entering the pool reduces contamination. Rinsing after helps remove chlorine, bacteria, and other irritants from the skin and urethral area.
2. Change Out of Wet Swimwear Promptly
Lingering in a damp swimsuit creates the perfect environment for bacteria. Dry off and switch into breathable clothing as soon as possible.
3. Stay Hydrated
Drinking plenty of water helps flush bacteria from the urinary tract. Hydration also counteracts the dehydrating effects of summer heat.
4. Practice Good Bathroom Habits
Always wipe front to back to prevent bacteria transfer. Urinating after swimming (and sex) can also help clear bacteria before infection sets in.
5. Be Mindful in Natural Waters
While lakes, rivers, and oceans can be fun, they pose higher risks. Avoid swimming after heavy rain, when bacteria levels spike, and be aware of water quality advisories.
6. Consider Added Protection with the V Seal
For women who are especially prone to UTIs, or who want an extra layer of reassurance, new options like the V Seal offer targeted support. The V Seal is a thin, second-skin adhesive barrier that covers the external genital area, helping to:
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Block bacteria-laden water from coming into direct contact with the urethra
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Reduce irritation from chlorine and other chemicals
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Provide peace of mind for women who struggle with recurrent infections
By adding a barrier between your body and the water, the V Seal helps address one of the most overlooked risk factors in UTI prevention.
In Summary
UTIs are incredibly common—the most widespread bacterial infection worldwide, affecting 64% of women at some point in their lives. Summer swimming adds to the risk, thanks to contaminated water, damp swimwear, and increased bacterial exposure. Studies confirm that swimming, especially in natural waters, significantly increases UTI odds.
While healthy habits like rinsing, changing clothes promptly, and staying hydrated reduce risk, they don’t eliminate it entirely. That’s why innovations like the V Seal matter. As part of a thoughtful prevention strategy, it provides women with an added layer of protection—so that summer days in the water can stay joyful and carefree, not interrupted by the pain of another UTI.
