Acute pancreatitis causes severe upper abdominal pain that radiates to the back ... connecting muscles. These include conditions include: Monitoring pain under the left rib cage is important.

which is connected to your rib cage. Many conditions can cause pain in your middle back, such as muscle strains or sprains, spine issues like herniated discs, or conditions like osteoarthritis.

Then there's the rib cage and sternum, which protect the heart and lungs. Besides protecting our organs, bones also work together with muscles and tendons to get the body moving. For example ...