Burns.
Unless they are 3rd degree burns, in which case your nerves have been burned off and you no longer feel anything. But 1st are annoying because they hurt whenever you touch the afflicted area, 2nd are painful because they are always hurting all the time...
Radiation burns are the worst though. All your internal organs get liquified and turn green and you start throwing them up. It also hurts. It hurts a lot.
If you couldn't tell that was a joke, HAHAHAHAHAHAHA I GOT YOU GOOD.