In short
  • Burning and going often is usually a bladder infection. A short course of the right antibiotic clears it.
  • Fever with back pain means it has reached the kidney. That needs treating today.
  • Infections that keep coming back have a reason. A urine culture and a scan usually find it.
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Same-Day Care Needed

Shivering fever with pain in the back or side means the kidney is involved. With a known stone, this is an emergency. Also come the same day if vomiting stops you keeping tablets down, if an elderly person becomes confused or very drowsy, if no urine is coming, or if you are pregnant — however mild it seems.

Three Different Problems

  • Bladder infection: Burning, going often, sudden urge, cloudy or smelly urine, sometimes a little blood. No fever. Common in women, because the passage is short.
  • Kidney infection: Shivering fever, pain in the back or side, vomiting, feeling very unwell. Bladder symptoms may or may not be there. Sometimes needs admission for drip antibiotics.
  • Prostate infection (men) — pain between the legs, in the lower belly or on ejaculation, along with urinary symptoms. Needs a longer course, usually two to four weeks, because antibiotics reach the prostate poorly.
In a Man, It Is Never Just an Infection
  • The male passage is long, so infection is uncommon — and usually has a cause behind it.
  • Common causes: an enlarged prostate leaving urine behind, a stone, a narrowed passage, or diabetes.
  • Any confirmed infection in a man needs at least an ultrasound with residual urine.
  • Treating the infection without finding the cause just means treating it again in a few months.

Tests You May Need

  • Urine routine: Pus cells, blood, nitrites.
  • Urine culture: The important one. It names the germ and shows which antibiotic works. Resistance is common now, so treating repeat infections without a culture often means using a drug that does nothing. Give the sample before starting antibiotics.
  • Blood sugar: Diabetes both invites infection and makes it worse. Repeat infections are sometimes how it is first found.
  • Ultrasound with residual urine: For any man, for repeat infections in women, and for anyone with fever.
  • CT KUB: If a stone is suspected, or fever does not settle in two to three days.
  • Cystoscopy: Only if the cause stays unclear, or blood remains after the infection clears.

Treatment

  • Bladder infection: A short course, usually three to five days, changed if the culture suggests better. Drink well and take paracetamol for discomfort.
  • Kidney infection: Seven to fourteen days. Drip antibiotics and admission if there is vomiting, high fever, or no improvement.
  • Prostate infection: Two to four weeks of an antibiotic that reaches prostate tissue. Stopping early is the commonest reason it turns long-term.
  • Blocked and infected kidney: Drainage first, by stent or a tube through the back. Antibiotics alone cannot clear a blocked system. The stone is dealt with weeks later.
  • Treating the cause: Clearing a stone, relieving prostate blockage, or controlling sugar. Skip this and infections keep returning however good the antibiotic was.
Third infection this year? The infection is not the problem.

Repeat infections usually have a cause that can be found and treated. Bring your old culture reports — they matter more than you would think.

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Stopping It Coming Back

For women with repeat infections and a normal scan:

  • Drink enough that urine stays pale through the day.
  • Do not hold urine for long. Empty fully rather than rushing.
  • Pass urine after intercourse, if infections follow that pattern.
  • Wipe front to back.
  • Treat constipation — it contributes more often than people expect.
  • After menopause, ask about vaginal oestrogen. Dryness is a common and treatable cause.

What to Bring

  • All old urine culture reports — the pattern guides everything.
  • Antibiotics already taken, with dates and how many days.
  • Any ultrasound or CT reports.
  • Recent sugar and creatinine results.
  • If you can, a fresh urine sample given before any new antibiotic.

Related: blood that stays after an infection clears · prostate blockage in men.

Dr. Azhar Anwar M.Ch. Urology (DMC Ludhiana) · DNB General Surgery · Consultant Urologist & Andrologist, Varanasi

This page provides general information only. It is not a substitute for medical advice, diagnosis or treatment. Consult a qualified urologist for assessment appropriate to your situation.