What is a urinary tract infection?
A urinary tract infection (UTI) is an infection in the urinary tract. The urinary tract includes the kidneys, the bladder and the urethra. The kidneys are 2 bean-shaped organs that lie against the spine in the lower back. As blood flows through the kidneys, waste is removed and stored in the bladder as urine. The bladder is the balloon-like organ that stores the urine. The urethra is the tube that carries urine from the bladder and out of the body.
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Written by familydoctor.org editorial staff