A urinary tract infection (UTI) is an infection that occurs in any part of the urinary system, which includes the kidneys, ureters, bladder, and urethra. UTIs are commonly caused by bacteria, often from the digestive tract, entering the urinary system. Symptoms may include a frequent urge to urinate, burning sensation during urination, and cloudy or strong-smelling urine. UTIs can affect anyone but are more common in women due to anatomical differences. Treatment typically involves antibiotics to eliminate the infection. Preventive measures include staying hydrated, practicing good hygiene, and urinating after sexual activity to reduce the risk of infection.