Pain is relative.
Its a sensation that is designed as a defense mechanism for the body, a warning system if you will.
When i was working as a Paramedic we would use the pain scale, getting a patient to judge the pain on a scale of one to ten, one being none.
Pain can be described as a number of things from throbbing, stabbing, dull.
Pain for me is a constant reminder that I have evil cells trying to kill me, constant reminder that i need to keep on my toes and fight for my life.
Pain is my body telling me im not dead yet!