I have found braxton hicks to be uncomfortable and painful both times now. The first time, they were uncomfortable. This time, they are truly painful. I'm wondering if it's because my uterine muscles have been stretched out from the first time so the resistance is less making me feel more.
Anyway, it's a tightening of the belly basically. It can happen on just one side even. Usually it starts at the top of your bump and moves downward. It lasts for about maybe 30 seconds and then goes away. There is usually just one here and there. Drinking water does seem to help.
I find myself getting kind of out of breath when I have one and I also feel it isn't easy to move. Having been in labor and knowing what real contractions feel like, I still think that for me braxton hicks are just as uncomfortable as the real thing. Actually some of my real contractions were less painful than my braxton hicks contractions had been.