Twisting pain under my left rib cage?

Need more info. Not enough detail to provide reasoned response. Age? Sex? Known medical problems? Current medications? When started? Any injury/trauma/new exercise or unusual straining. Any fever, nausea, cough, URI symptoms, GI symptoms? Previous history of same problem? Worsening activities/movements. Relieving activities/movements/ meds. A shot in the dark without more information or a star trek tricorder.
Twisting pain in rib. On the left side, "twisting" pains, usually some kind of cramp, reflects colonic peristalsis (your colon trying to move some stool along). If you feel constipated, take a good laxative. The best one is miralax, (polyethylene glycol) 1 capful of powder in a glass of water or juice, once a day.