I feel very lucky to have not ever had anything like kidney stones, issues with my gallbladder or even a UTI. Most people I know have dealt with at least one of the above and I haven't yet but I can't help but think my luck will eventually run out. :erm: I've heard the stones are extremely painful though, I've known quite a few people who have had them.
If it hurts, it classifies as an injury in my book. I'd even say heartbreak is a form of injury.