I would think Alcohol "causes" anxiety. About a good 30 days after I stopped drinking, the anxiety and jumpiness I would regularly experience went away. While life its self still causes bouts of anxiety, it's not the same as the anxiety of waiting and wanting, and wanting and waiting for THAT time, where I drank. Yes, alcohol caused me to be uptight/anxsious until I could satisfy it's demands. It was the cause. I wouldn't at all be surprised if that very same anxiety was the direct cause of my stomach getting the short jabbing sensations I used to get, which are rare if ever today.