Until I got the T.N. that abscess was the worst pain I had ever felt. So far above whacking my 'nads on a wooden fence you couldn't even find it on a pain chart.
If you want an approximation of the experience, sharpen the tines of a fork, hook it up to a car battery and jam it into your jaw all the way to the bone. Then have someone wiggle it in time with your heartbeat. Leave it that way for a couple days, with no letup and then add another, poking this one in from the inside.