BEAT THE STITCH!
What it feels like: Intense, stabbing pain under the rib cage, usually on only one side Why it happens: According to Dr Dean Somerset, an exercise physiologist in Alberta, Canada, “Typically, if someone is cramping, they’re using muscles on that side preferentially over others that would contribute to breathing.”
The fix: While standing, take a few deep belly breaths, then press two fingers directly into the affected area. As you apply pressure, continue taking deep breaths and lean towards your opposite side from your hips. Hold for several seconds or until you feel the pain subside.