Can drinking more water help flush out a UTI? What you need to know

Urinary tract infections (UTIs) are among the most common infections, especially in women. They occur when harmful bacteria enter and multiply in parts of the urinary system such as the bladder, urethra, or kidneys.

Symptoms include burning while urinating, frequent urges to pass urine, pelvic discomfort, and cloudy or foul-smelling urine. Hydration plays a vital role in supporting urinary tract health, particularly during infection. Drinking more water can help flush out bacteria, ease irritation, and promote healing. While water alone may not cure a UTI, it can be a highly effective aid alongside proper medical treatment.

In this article, we explore how hydration impacts UTIs, how much water is beneficial, and when professional care is essential.

What is a UTI and why does hydration matter

A urinary tract infection occurs when bacteria most commonly Escherichia coli enter the urinary tract and begin to multiply. While the body has its own natural defences, certain factors can allow bacteria to overcome them, leading to infection. UTIs can affect the lower tract (bladder and urethra) or, in more severe cases, spread to the upper tract and kidneys.

Hydration becomes particularly important because urine acts as a natural flushing mechanism for the urinary system. Drinking enough water increases urine output, which in turn helps clear bacteria from the bladder before they can take hold. This simple step not only assists in managing a current infection but may also help in preventing future episodes.

Increasing your water intake can support the body’s natural ability to flush out infection-causing bacteria.

When you drink more fluids, your body produces more urine. This leads to more frequent urination, which helps clear bacteria from the urinary tract before they can adhere to the bladder lining, multiply, and cause a full-blown infection.This flushing mechanism is especially useful in the early stages of a UTI or for individuals prone to recurrent infections. By keeping the urinary system active and regularly emptied, you’re making it harder for bacteria to remain in place long enough to trigger inflammation or symptoms.A study published in JAMA Internal Medicine found that women who experienced recurrent UTIs and drank an extra 1.5 litres of water daily had 50% fewer infections over a 12-month period compared to those who drank less. These women also needed fewer antibiotics and experienced longer symptom-free periods between infections. This provides strong evidence that increasing daily water intake can be an effective preventative strategy for those vulnerable to recurring UTIs.

The recommended fluid intake during a UTI may vary from person to person, depending on factors such as body size, activity level, and overall health. However, a general guideline is to aim for 1.5 to 2 litres per day, roughly six to eight glasses of water.During a UTI, it may be helpful to increase this amount slightly to 2 to 2.5 litres per day, unless otherwise advised by a healthcare provider. Drinking too much too quickly is unnecessary and may cause discomfort; instead, aim for steady intake throughout the day to keep urine flowing and bacteria flushing out.If your urine is light in colour and you are urinating regularly, you’re likely well-hydrated.

Why staying hydrated helps during a UTI

There are several physiological reasons why proper hydration makes a difference during a UTI:

Hydration is one of the most natural ways to support the body’s infection-fighting mechanisms and improve recovery outcomes.

Can water alone cure a UTI

Although water plays a helpful role, it cannot cure a UTI on its own. Most UTIs, especially those affecting the bladder or kidneys, require antibiotics to eradicate the infection fully.Relying solely on increased fluid intake can delay treatment and potentially lead to more serious complications. If a UTI is left untreated, it may spread to the kidneys and cause symptoms such as fever, back pain, and nausea, indicating a more severe infection that requires immediate medical attention.Think of water as a supportive strategy that complements, but does not replace, proper medical care.

Other natural measures that may help alongside hydration

In addition to increasing your water intake, consider these practices to support UTI recovery and reduce recurrence:

While these measures won't cure an active infection, they may help create conditions less favourable to bacterial growth.Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making any changes to your health routine or treatment.Also read | Do kidney stones increase the risk of kidney cancer? Understanding the link between the two