
A urinary tract infection (UTI) is an infection in any part of your urinary system — your kidneys, ureters, bladder and urethra. Most infections involve the lower urinary tract — the bladder and the urethra.
Women are at greater risk of developing a UTI than are men. Infection limited to your bladder can be painful and annoying. However, serious consequences can occur if a UTI spreads to your kidneys.
Doctors typically treat urinary tract infections with antibiotics. But you can take steps to reduce your chances of getting a UTI in the first place.
Urinary tract infections don't always cause signs and symptoms, but when they do they may include:
UTIs may be overlooked or mistaken for other conditions in older adults.
| Part of urinary tract affected | Signs and symptoms | ||
|---|---|---|---|
| Kidneys (acute pyelonephritis) | Upper back and side (flank) pain | ||
| High fever | |||
| Shaking and chills | |||
| Nausea | |||
| Vomiting |
| Part of urinary tract affected | Signs and symptoms | ||
|---|---|---|---|
| Bladder (cystitis) | Pelvic pressure | ||
| Lower abdomen discomfort | |||
| Frequent, painful urination | |||
| Blood in urine | |||
| Urethra (urethritis) | Burning with urination | ||
| Discharge |