I've been pitching for about 2 and a half years now, and when I first began training, I noticed that occasionally my hand would swell to be about twice (or more) than the size it should be. I've hit speeds of about 57, but my consistent speed is around 55. I've asked every coach and pitching instructor that I've come across, and no one seems to have a clear answer. Sometimes I can pitch a solid 3-4 innings without a problem, but other times I can barely get passed warm up without my hand swelling. It doesn't hurt or tingle, it just becomes really red and swollen - not allowing me to grip the ball. I've done so much research and can't seem to find any answers. Please help!!