Best I can describe - at least for the physical realm - is this: imagine doing about 400 crunches in the wrong way. Then picture how you feel the next day, and add some itching to boot. That's about the equivalent.
I have been very, very fortunate in that I haven't experienced a lot of physical pain to this point. Of course I am a wimp and am very careful in what I do (it's really fun to drop things on the floor and ask someone to pick it up because I can't get to the floor yet) ... but otherwise, the discomfort is mainly that due to sitting still or lying still for hours on end. I haven't sneezed yet, though. . .