Burning when you pass urine. Running to the washroom again and again. And still feeling that the bladder has not emptied. Almost half of all women will have a urinary tract infection at some point in their life, which makes UTI in women one of the most common reasons to see a doctor — and one of the most commonly mistreated, because the usual response is a leftover strip of antibiotics from the medicine drawer.
I am Dr Manmeet Singh, Director of Urology, Robotics & Kidney Transplant at Medanta Hospital, Lucknow. Below is what actually causes these infections, which symptoms mean you should be seen the same day, and which prevention advice holds up when you look at the trials. The full explainer is in the video further down.
What a UTI actually is
A urinary tract infection is a bacterial infection of the urinary system. Most often it sits in the bladder, which is called cystitis. If the infection climbs upwards and reaches the kidney, it is called pyelonephritis — and that is a far more serious illness, not a stronger version of the same thing.
Why women get UTIs far more often than men
There are two straightforward reasons, and neither is anyone's fault.
- Anatomy. The female urethra, the tube that carries urine out, is short — roughly four centimetres — and its opening lies close to the vagina and the anus. Bacteria simply have a much shorter distance to travel.
- The organism. The usual culprit is E. coli, a bacterium that normally lives harmlessly in the intestine. In a multi-centre Indian study led by AIIMS, E. coli accounted for about 68% of community-acquired urine infections.
The risk factors that are actually proven
Large studies in young women have consistently identified five:
- Frequent sexual intercourse
- Use of spermicide
- A new sexual partner
- A first UTI at age fifteen or younger
- A mother who also had urinary infections
Other groups carry higher risk: women who are pregnant, women with diabetes, women after menopause, and anyone with a stone or a blockage in the urinary tract. If stones are the underlying reason, treating the infection alone will never settle the problem — the stone itself has to be dealt with.
One widely repeated piece of advice deserves honesty. Passing urine after intercourse is commonly recommended. It is harmless, so there is no reason to stop. But in two major studies it did not lower the risk of infection. Please do not rely on it as your only protection.
Symptoms — and the red flags that need same-day care
A bladder infection usually announces itself as burning while passing urine, passing urine very frequently, a sudden urge you cannot hold, pain low in the abdomen, and urine that is cloudy, strong-smelling or blood-stained. If burning is your main complaint, there is more detail on what causes burning urination and when it is something else.
These three suggest the infection has reached the kidney:
- Fever with chills
- Pain in the back or side, just below the ribs
- Nausea or vomiting
If you have any of them, see a doctor the same day. A kidney infection treated late is a hospital admission; treated early it is usually a course of the right antibiotic.
Why a urine culture matters so much in India
A urine culture answers two questions a dipstick cannot: which bacterium is present, and which antibiotic will actually kill it. That second question has become urgent here. In the same AIIMS-led study, more than half the E. coli samples — 52.8% — were ESBL producers, meaning they resist many of the antibiotics prescribed most casually.
This is why the American Urological Association guideline recommends a urine culture before treatment when infections are repeating. Guessing the antibiotic is how a simple infection becomes a resistant one.
One point that saves a lot of needless medicine: if a urine test shows bacteria but you have no symptoms at all, it usually does not need antibiotics. This is called asymptomatic bacteriuria. The two important exceptions are pregnancy, and the period before certain urological procedures.
Three rules about antibiotics
- Do not self-medicate.
- Complete the course your doctor prescribes, even once you feel better.
- Never use leftover antibiotics from a previous illness.
Wrong or half-finished antibiotic courses are a major reason resistance keeps climbing — and the person who pays for it is usually the same patient, at the next infection.
UTI in pregnancy is never optional to treat
In pregnancy, bacteria in the urine without any symptoms is found in 2 to 15% of women. Left untreated, up to 30% go on to develop a kidney infection. A Cochrane review found that treating it reduces the risk of kidney infection by roughly three quarters.
That is why a urine test during pregnancy is not a formality. It is one of the genuinely protective tests in antenatal care, and a positive result is treated even when the mother feels perfectly well.
When the infection keeps coming back
About one in four women has a second infection within six months of the first. Two infections in six months, or three in a year, is defined as recurrent UTI — and at that point the question is no longer which antibiotic, but why.
That needs a proper urological evaluation rather than another course bought over the counter. I have written a separate, detailed guide on why recurrent UTI keeps coming back and what to do about it, and you can read about how repeated urine infections are evaluated and treated in Lucknow.
Prevention: what the evidence actually supports
Plenty of advice circulates on this topic. Here is what has survived proper testing.
- Water, and it works. In a one-year randomised trial, women who were drinking under one and a half litres a day were asked to add another one and a half litres. Their infections fell from 3.2 to 1.7 per year — close to half.
- Cranberry, for prevention only. A 2023 Cochrane review of 50 trials found cranberry products reduced risk by about 26% in women with recurrent infections. It is a preventive measure, not a treatment for an infection you already have.
- Vaginal estrogen after menopause. Prescribed by your doctor, it reduced infections from 5.9 to 0.5 per patient-year in a landmark trial — one of the largest effects in this entire field.
- Avoid spermicide if you are getting repeated infections, and consider a different contraceptive method with your gynaecologist.
And one popular supplement worth being honest about: a 2024 trial in nearly 600 women found that D-mannose did not significantly reduce infections. If it has not helped you, that is consistent with the evidence.
Watch the full explainer
In the video below I go through all of this in detail — what a UTI is, why women are more prone to one, the red flags, why the urine culture matters, and the prevention measures worth your money. Share it with the women in your family; this is a subject most people manage quietly and badly.
The short version
A UTI is common, but it is not something to sit on. Fever or back pain means you should be seen the same day. Get a urine culture and take antibiotics only as prescribed. Drink more water than you think you need. And if the infections keep returning, stop treating them at home and get evaluated by a urologist — repeated infections are a signal, not just a nuisance.
About Dr Manmeet Singh
Dr Manmeet Singh, MS, MCh (SGPGIMS Lucknow), is Director of Urology, Robotics & Kidney Transplant at Medanta Hospital, Lucknow, and was previously faculty at King George's Medical University. He treats the full range of urinary tract conditions in women and men, including recurrent infections, stones and reconstructive urology, and publishes weekly evidence-based videos in Hindi and English.
This article is for education only. It is not a substitute for a medical consultation.