I once had a hole in my filling (I actually think its still there, though it doesn't hurt) and my god, it was agony whenever I ate or drank. Id almost be in tears at school some lunch times from the pain, and I just used to clutch my jaw hoping it would go. It only lasted 4-5minutes, but the pain was intense.

Cutting my stomach open was another, I was climbing over a fence and slipped, and yeah xD

Headaches are bad, but they are liveable with. The ones I get arnt *that* bad, nothing some paracetamol + a night's sleep won't solve.

The only other one I can think of is a nasty iron burn. That is pure agony, I only touched a finger on it, and it was like someone kept stabbing my finger. I had to keep my hand submerged in cold water all night. It left a nasty white blister.

1. Iron
2. Toothache
3. Stomach