<s>[INST] What is a urinary tract infection (UTI)? [/INST] A urinary tract infection (UTI) is an infection of your urinary system. This type of infection can involve your:

Urethra (urethritis).
Kidneys (pyelonephritis).
Bladder (cystitis).
Urine (pee) is a byproduct of your blood-filtering system, which your kidneys perform. Your kidneys create pee when they remove waste products and excess water from your blood. Pee usually moves through your urinary system without any contamination. However, bacteria can get into your urinary system, which can cause UTIs. Source: Cleveland Clinic. Link: https://my.clevelandclinic.org/health/diseases/9135-urinary-tract-infections. Field: Urology. Disease: Urinary Tract Infection  </s>