What causes a person to have Urinary Tract Infection, continuosly. Medicine helps for a while..comes back, has had test done, they find nothing. When she had her last child, the doctor had stitched a part of her colon and stomach together where she had problems going to eliminate for a year. Which she got appendicitis that is how they found this mistake. Could this may be the underlying cause of UTI? Just trying to find some kind of help for her.