When you have a UTI, the lining of the bladder and urethra become red and irritated just as your throat does when you have a cold. The irritation can cause pain in your belly and pelvic area and may make you feel like urinating more often. You may even try to urinate but only get a few drops and/or feel some burning as your urine comes out. At times, you may lose control and wet yourself. You may also find that your urine smells bad or is cloudy.
Kidney infections often cause fevers and back pain. These infections need to be treated at once because a kidney infection can quickly spread into the bloodstream and cause a life-threatening health issue.