Hmmm.. This thread does indeed have the potential to sound like a group of elderly codgers sitting around discussing their various surgeries and problems with bowel elimination..
However, to topic..
The worst pain I have ever experienced is undoubtedly when my skin became a sore, weeping, and infected, mess. Every part of me felt as though millions of burning needles had replaced my skin. I have suffered from eczema all of my life, and around 18 years ago a number of trigger factors collided and I subsequently ended up in hospital under heavy doses of antiobiotics and cortisone (a steroid medication used for conditions with severe inflammation).
For myself, I do not view childbirth as painful, even though it was (I did it drug free) because it was 'positive pain'.. if that makes sense?