Urinary tract infections, often called water infections, are one of the most preventable types of bacterial infection. The single most effective habit is drinking more water: women who added 1.5 liters (about six extra glasses) of water to their daily intake in a 12-month clinical trial cut their infection rate roughly in half. Beyond hydration, a combination of hygiene habits, clothing choices, and targeted supplements can significantly lower your risk.
Drink More Water Throughout the Day
The logic is simple: the more you urinate, the more frequently you flush bacteria out of your urinary tract before they can multiply and cause an infection. A randomized trial published in JAMA Internal Medicine tested this directly. Premenopausal women who were prone to repeat infections added 1.5 liters of water per day on top of what they already drank. Over 12 months, they had significantly fewer infections than women who made no changes to their fluid intake.
You don’t need to measure this precisely. An extra six glasses of water spread across the day gets you close to 1.5 liters. The key is consistency, not perfection. Carrying a water bottle and sipping regularly works better than forcing yourself to drink large amounts at once. And when you feel the urge to urinate, go. Holding it in gives bacteria more time to attach to the bladder wall.
Wipe From Front to Back
The bacterium responsible for most water infections, E. coli, lives naturally in the bowel. Any habit that moves fecal bacteria toward the urethra raises infection risk. Research published in Cureus found that women who wiped by reaching from the front between their legs (which moves the hand from back to front) had significantly more lifetime infections than women who reached behind and wiped front to back. The association was strongest in women aged 40 to 59.
The practical takeaway: after using the toilet, reach behind and wipe in a front-to-back direction. This keeps bowel bacteria away from the urethral opening. It’s a small adjustment, but it removes one of the most common bacterial transfer routes.
Urinate After Sex
Sexual intercourse can push bacteria toward or into the urethra, which is why infections sometimes follow sex. Urinating afterward flushes those bacteria out before they can travel to the bladder. The evidence suggests voiding within 15 minutes offers the most protection, particularly for women who don’t have a long history of recurrent infections.
This isn’t a guarantee against infection, but it’s one of the easiest preventive steps you can take. Drinking a glass of water before or after sex helps ensure you’ll need to go soon.
Avoid Spermicide Products
Spermicide, particularly the active ingredient nonoxynol-9, disrupts the normal balance of bacteria in the vagina. This allows infection-causing bacteria like E. coli to colonize more easily. A study of young women found that using spermicide-coated condoms more than twice a week increased UTI risk nearly sixfold compared to non-use. Among women exposed to these products, spermicide-coated condoms were responsible for roughly 42% of their infections.
If you’re prone to water infections and currently use spermicide-based contraception, switching to a non-spermicidal condom or an alternative method can make a meaningful difference. This is one of the most underrecognized risk factors.
Wear Breathable Underwear
Moisture trapped against the skin creates an environment where bacteria thrive. Cotton underwear wicks sweat and moisture away from the body more effectively than synthetic fabrics. Cleveland Clinic recommends 100% cotton for anyone who experiences recurrent urinary or vaginal problems, noting that even synthetic underwear with a cotton crotch panel doesn’t provide the same breathability.
Loose-fitting clothing also helps. Tight jeans, leggings, or synthetic workout wear worn for extended periods can trap heat and moisture. Changing out of damp swimwear or sweaty gym clothes promptly reduces the time bacteria have to multiply near the urethra.
Cranberry Products With Enough PACs
Cranberries contain compounds called proanthocyanidins (PACs) that prevent E. coli from sticking to the bladder wall. But the dose matters. Research shows that a daily intake of at least 36 mg of PACs is needed to produce urine with meaningful anti-adhesion properties. Many commercial cranberry juices and supplements fall well below this threshold.
If you want to try cranberry for prevention, look for supplements that list their PAC content on the label and confirm it meets the 36 mg minimum. Cranberry juice cocktails are often diluted and loaded with sugar, making them a poor choice. Concentrated capsules or tablets are generally more reliable for hitting the effective dose.
D-Mannose as a Supplement
D-mannose is a naturally occurring sugar that works differently from cranberry. E. coli bacteria bind to mannose receptors on the bladder wall, and supplemental D-mannose essentially acts as a decoy, giving bacteria something else to latch onto so they’re flushed out when you urinate. Clinical trials are testing a daily dose of 2 grams (typically four 500 mg capsules) for preventing recurrent infections. While research is still ongoing, some women already use D-mannose as a daily preventive measure, and it’s widely available over the counter.
Vaginal Probiotics for Recurrent Infections
The vagina naturally hosts protective bacteria, primarily Lactobacillus species, that produce hydrogen peroxide and keep harmful bacteria in check. When this balance is disrupted, infection-causing bacteria can migrate to the urinary tract more easily. A phase 2 clinical trial tested an intravaginal probiotic containing Lactobacillus crispatus in women prone to repeat infections. Recurrent UTI occurred in 15% of women who received the probiotic compared with 27% in the placebo group. Women who achieved strong vaginal colonization with the probiotic saw their recurrence risk drop by over 90%.
Vaginal probiotics are a newer approach and not yet standard practice, but they represent a promising non-antibiotic option for women dealing with frequent infections. Products vary widely in quality, so look for those containing well-studied strains like Lactobacillus crispatus or Lactobacillus rhamnosus.
Estrogen Therapy After Menopause
Water infections become more common after menopause because declining estrogen levels change the vaginal environment. The tissue becomes thinner and drier, vaginal pH rises, and protective Lactobacillus bacteria decline. This combination makes it easier for harmful bacteria to flourish. A meta-analysis of five studies involving nearly 2,000 postmenopausal women found that topical vaginal estrogen reduced recurrent infections by 58% and lowered vaginal pH significantly.
Topical estrogen comes in creams, rings, or tablets applied directly to the vaginal area. It works locally rather than throughout the body, which minimizes systemic side effects. For postmenopausal women who get two or more infections in six months, this is one of the most effective preventive options available.
Recognizing a Pattern of Recurrence
A single water infection is common and often a one-off event. But if you’re experiencing two or more infections within a six-month period, or three or more within a year, that meets the clinical definition of recurrent UTIs according to the American Urological Association’s 2025 guidelines. At that point, the strategies above become especially important, and combining several of them tends to work better than relying on any single approach. Increasing water intake, choosing the right underwear, and adding a cranberry or D-mannose supplement together create multiple barriers against infection rather than just one.