what muscle is under the left rib cage
Muscle spasm under left rib cage - I am a 40 yo female with no family hx of heart problems and otherwise healthy. Having muscle spasms under left rib cage no pain 4 or 5 a day for 2 day? Rib cage. The pains you describe are not likely to relate to the heart. They are more likely musculoskeletal, neurological or inflammatory in nature.