I was hoping someone would have more insight on this because it's really driving me crazy. I've been an on-and-off runner for year, but only recently in the past few months really gotten back into it again, where I'm running about 3-4 times a week. However, in the past 2-3 weeks, I've found that every time I run for about 7 minutes, I start to get really painful and severe stitches under left and/or right ribs. It becomes worse when I run harder, but it'll be a proper stabbing feeling at about 9km/hour. As you can imagine this is extremely frustrating because I'm not unfit and even that tired but it is so hard to have to work through the pain of stitches rather than fitness. I've tried stretching beforehand, eating a good meal more than an hour before I run, trying to run more 'smoothly' so that there is less of a jolting feeling on my body, tensed my abs the entire run (helped a little but not an incredible amount). If anyone has had this before and can help on prevention, or if not then combating the problem that would be greatly appreciated.