Learn about symptoms of urinary tract infections . Find out what causes UTIs, how infections are treated and ways to prevent repeat UTIs. What is a UTI? A urinary tract infection occurs when harmful bacteria invade any part of the urinary system, comprising the kidneys, ureters, bladder, or urethra. The infection usually starts in the lower tract (urethra and bladder) and can ascend to the kidneys if left untreated. Our specialists at Manipal Hospital Baner emphasise early intervention to prevent serious consequences like kidney infections or sepsis. Symptoms of a urinary tract infection include pelvic pain, pain when urinating, and blood in the urine. Complications include kidney failure and sepsis. Urinary tract infections (UTIs) can affect your bladder, your urethra or kidneys. Find out about symptoms , causes and treatment of UTIs.