Biggest pain you've ever felt?

[EeveeElectro]

I have some kind of problem with my joints/bones/muscles which doctors seem to think is not worth looking at even though it hurts like fuck.

Whenever I do a long shift at work (especially when it's cold) I get home and my joints seize up until it's pretty much impossible to walk. I've walked straight inside my house before, collapsed in a heap and had to drag myself upstairs on my hands and knees, or got someone to prop me up.
I usually take a few paracetamol and run a hot bath. I have heat rub, heatpads and hot water bottles to make it better. But it's just the pain before, it's unbearable to the point of me crying my eyes out and not being able to eat.

Also period pain... I'm actually quite lucky because I know a lot of girls who can't work because theirs gets so bad. A couple of times I've been like that, where you just curl up in bed all day. It feels like someone's twisting a knife in your stomach/groin area and letting you slowly bleed to death. Or kicking you repeatedly in the crotch >.<

 

[ZtH]

I once had to get an absurd amount of stitches because while running into another kid on the playground his tooth tore into my eyebrow. Neither the stitches nor the injury were that painful(his tooth severed the nerve) the application of the anesthetic was putting the needle in my forehead and then wiggling it around while the anesthetic was squeezed out. It was a horrible feeling.