Can You Flush Out a UTI With Water?
NIH guidance recommends drinking plenty of liquids, mostly water, to ease symptoms and support healing while you're being treated. That advice rests mainly on clinical experience rather than trials.
There's no evidence that forcing fluids helps clear an active infection. UK guidance asks only that you drink enough to avoid dehydration. If you have kidney failure, heart disease, or incontinence, ask your clinician how much fluid is right for you.
The trial evidence for water is more about prevention than treatment. In a 2018 randomized trial, 140 premenopausal women who'd had at least three bladder infections in the past year and who drank less than 1.5 liters of fluid a day were split into two groups. One group added 1.5 liters of water daily, about six cups, on top of their usual drinks.
Over the next year, that group averaged 1.7 infections, compared with 3.2 in women who kept their usual habits, and needed about half as many antibiotic courses.
Danone Research, the R&D arm of Evian's parent company, funded the trial, and four of its seven authors worked there. Funding doesn't make a result wrong, but worth mentioning as you consider the study’s findings.
Every woman enrolled was also a light drinker, so nobody knows whether extra water helps someone who already drinks more than 1.5 liters a day. The 2025 AUA guideline reflects that: clinicians may offer increased water intake to women with recurrent UTIs whose intake falls below that mark.
If you'd like an ongoing read on your hydration, Throne clips onto your toilet and builds a daily hydration score from your urine automatically, with no buttons and no manual logging. It's a wellness measure, not a clinical test, and it can't detect bacteria or tell you whether you have a UTI.
Does Cranberry Juice Help a UTI?
Cranberries contain proanthocyanidins (PACs), compounds that stop E. coli from sticking to bladder cells. That's the leading theory for how cranberry works. It’s only a theory, not settled science.
The most thorough look at prevention is a 2023 Cochrane review of 50 trials and 8,857 people. Cranberry products probably lower the risk of repeat infections in women with recurrent UTIs: about 18 in 100 women using cranberry had another confirmed UTI during the trials, compared with about 24 in 100 who weren't.
The review also found benefit in children and in people prone to UTIs after medical procedures. Older adults living in care facilities, pregnant women, and people who can't fully empty their bladder saw little or no benefit.
For an infection you already have, cranberry won’t help. A systematic review found the evidence inadequate, and in the largest trial, advice to drink cranberry juice did no better than advice to drink water.
If you get recurrent UTIs, bring up cranberry with your doctor as a prevention option. No dose or form has been established, and the Cochrane review found no clear difference between lower and higher PAC doses. A jug of sweetened cranberry cocktail during an active infection isn't a treatment plan.
Do You Need to Give Up Coffee, Alcohol, and Soda?
You don't have to swear off any of them. An international expert review found that evidence linking caffeine, alcohol, and fizzy drinks to worse bladder symptoms is mixed and sometimes contradictory. Most of it comes from overactive bladder research, not from infections.
Some people find these drinks make urgency worse while the bladder is inflamed. If your morning coffee clearly sends you running more often, skip it until you've recovered. If it doesn't, you don't need to give it up.
Alcohol has one more wrinkle: some antibiotics interact with it. Ask your pharmacist about your specific prescription.
What Helps While You Recover
Antibiotics clear the infection, so these steps are about staying comfortable in the meantime and lowering the odds of a repeat.
Drink steadily. Aim for pale yellow urine rather than a set number of glasses, with water as your default. Most healthy adults pee six to eight times a day.
Don't hold it. Going when you feel the urge is one of the habits NIH recommends for keeping the urinary tract healthy.
Try heat and a pain reliever. A heating pad on your lower belly or back can ease the ache, and acetaminophen or ibuprofen can help if they're safe for you.
Take your antibiotic exactly as prescribed. If side effects make that hard, call your prescriber rather than stopping on your own.
Plan ahead if infections keep returning. Two culture-confirmed infections within six months, or three within a year, is the usual definition of recurrent UTI. At that point, ask your doctor about prevention, including water and cranberry.
When to See a Doctor
How fast you need care depends on your symptoms and your situation, not just on how much it burns.
Bring it up at your next checkup if you've had occasional bladder infections in the past and want to talk about prevention, or if certain drinks seem to trigger urgency without burning or other signs of infection.
Contact a clinician within a day or two for new burning, urgency, or frequency that sounds like a bladder infection.
Call the same day if you're a man or pregnant, since clinical guidelines usually call for a urine culture and prompt antibiotics in both groups. The same goes if you have a weakened immune system or a known urinary tract problem, if you see blood in your urine, or if your symptoms return soon after treatment or haven't improved within 48 hours.
Get seen in person today for fever or chills, nausea or vomiting, or pain in your back, side, or groin. These can mean the infection has reached a kidney, which needs treatment quickly. Go to the emergency room if you feel very sick, confused, or faint, or can't keep fluids or medication down.
Frequently Asked Questions
Q: Can you flush out a UTI by drinking water?
A: Not on its own. Staying hydrated is sensible during a bladder infection, but antibiotics are the usual treatment. Water's trial evidence is for preventing future infections in women with recurrent UTIs who drink less than 1.5 liters a day.
Q: Does cranberry juice get rid of a UTI?
A: Cranberry hasn't been shown to treat an active UTI. In the largest trial, advice to drink cranberry juice did no better than advice to drink water. Its evidence is for prevention in specific groups, mainly women with recurrent UTIs, children, and people prone to UTIs after medical procedures.
Q: What should you not drink when you have a UTI?
A: Nothing is off-limits by default. Evidence that caffeine, alcohol, or fizzy drinks worsen bladder symptoms is mixed, so skip one only if it clearly makes your urgency worse. If you're taking an antibiotic, ask your pharmacist whether alcohol is safe with it.
Q: How much water should you drink with a UTI?
A: No specific amount has been proven for an active infection. Drink steadily through the day and aim for pale yellow urine, without forcing large volumes. If you have kidney disease, heart disease, or incontinence, ask your clinician what's right for you.
Q: Are cranberry pills better than cranberry juice for UTIs?
A: Research hasn't settled whether juice or capsules work better, and no dose has been established. The 2023 Cochrane review found no clear difference between lower and higher doses of PACs, the compounds thought to be active. In any form, cranberry is a prevention option to discuss with your doctor, not a treatment.
