If the bladder is infected, it is called cystitis. If the kidneys are infected, it is called pyelonephritis. It is important to treat UTIs so that the kidneys are not damaged. Cause Urinary tract infections are caused by bacteria. The bacteria enter the bladder by traveling up the urethra.
Common irritants are bubble bath and shampoos.
Careless wiping after a bowel movement might also cause irritation. Expected Course With treatment, your child's fever should be gone and symptoms should be better by 48 hours after starting the antibiotic. Read the advice on preventing UTIs to decrease your child's risk. If the medicine is liquid, store it in the refrigerator and shake the bottle well before you measure a dose. Use a measuring spoon to be sure that you give the right amount.