I've started running recently. About 4 miles now 3 times a week with the occasional 2 mile or squash at the weekend. For the first couple of weeks I was absolutely fine, no stitch at all, but in the last week or so I barely run half a mile before getting a really terrible stitch, and it will last pretty much the remainder of the run, moving up and down my right side and even into my shoulder sometimes (I've been told that this sometimes happens). I'm totally fine playing squash, and I'm not pushing myself too hard at all. In fact I think I could up the pace considerably, but I'm trying to improve my stamina which means long but steady runs rather than short and fast. I've tried breathing deeper, running more upright, taking a break and powering through - ignoring it, eating and not eating before a run. I drink about 2/3 litre of water a day at least and hold off about an hour before the run. Basically, I'm stumped and it's beginning to get really irritating! (I have lost almost a stone since I started though! ) Anyone got any advice?