My appendix got infected and actually ruptured.
......And I went to the hospital a day LATER. (I was 11 and didn't complain to my parents about the pain.)
Another day and I would have died. I was in the hospital for 3 weeks.
They had to cut me open enough to get it all out.
I got 15 staples to close it back up. After the 15 staples got taken out, there was still a hole that they said would close on its on. It would leak puss and I could see into my stomach!