If you got a headache listen to load music, if you got a stomach ache do sit-ups, if the wast majority of your body was hurt in a none-extremely bad way just tear your nails into it until all you really feel is just an odd itch where you're currently feeling pain, regularly hold onto hot metalic objects like radiators for several minutes, regularly hold your little finger under a tiny ray of hot water for several minutes while slowly making the water hotter, regularly smash your head into various objects, eventually you won't really feel any pain you can't quickly start ignoring and stop feeling it, of course all these various things would require being able to ignore pain (while still feeling it) already.