J.B.
When my daughter was 16, she was having recurring UTI problems, so the urologist ordered the tests. We didn't know she was allergic to iodine--which is what they use. She went into anaphylatic shock and nearly died. A simple allergy test, nothing more than a tiny amount under the skin, would have prevented this. Oh, and by the way, once she stopped drinking carbonated drinks, her UTI problems disappeared.