Last week I did a routine that involved scissor kicks and lifting/sitting up from a laying down position. The next day, I thought I had a hernia! I had pressure (not pain) in my lower abdomen and my bladder was irritated when I urinated. A little stinging sensation when seated too. In two days, all was better and haven't felt anything since. That "stinging" I had was something I felt when my c-section was healing, back in December 2015. My only thought is that somehow this particular core exercise (and I won't do it again) really irritated that area, even after so many years. Otherwise, I can't figure out what this was. I'll be going for my annual GYN soon and will mention this, but curious to know if others can irritate the c-section area. I imagine there must be scar tissue and the like that could be set off.