UTIs (Urinary Tract Infections) can strike without warning, leaving discomfort and unease in your body. Your kidneys' function of filtering your blood results in the waste product known as urine. You urinate when your kidneys remove waste and extra water from your blood. Normally, urine passes through your urinary system uncontaminated. UTIs, however, can be brought on by bacteria or sexual activity entering your urinary system. UTIs can bother you while you urinate and cause ...