People can have a UTI without symptoms. But in most cases, they will notice problems. The most common are:

  • Increased frequency of passing urine
  • Feeling of urgency to pass urine
  • Burning or pain while passing urine
  • Itching in the genital area
  • Passing only small amounts of urine at a time
  • Pain over the area of the bladder or in the lower back
  • Pain along the sides under the ribs
  • Blood in the urine—may be on the tissue after wiping after passing urine in women
  • Cloudy looking urine—may also have pus
  • Unpleasant smell to urine
  • Unable to hold the urine during the day or night

If the infection has gone up into the kidneys, you may have:

  • Fever or chills
  • Severe pain in the lower back

Children and babies may have less common problems such as:

  • Irritability
  • Feeding problems
  • Not being able to hold their urine
  • Diarrhea
  • Nausea or vomiting
  • Slow weight loss and growth—failure to thrive

Older people may have more vague symptoms of a UTI such as fatigue, confusion, loss of appetite, or trouble walking.