I was hit in the back by a friend messing around. He hit me on the lower left hand side pretty good. After that I had some general soreness, but then the next day it started to hurt through to my front. I also became constipated. I was constipated for about 3-4 days. I ended up taking a laxative and that helped. I was wondering if that punch could have caused that and if so if that could have cause any serious damage. It has been 5 days since the punch and I am feeling better but still having some stomach pains and not much of an appetite.