Less-Threatening (But Bothersome) Causes The following are less-serious causes of pain under the left rib cage. Kidney Stone A kidney stone is a solid mass formed in the kidney. It often causes ...

You’ve most likely heard of the rib cage. Everyone has one ... that connects the ribs to the breastbone is a common cause of chest pain, as are rib fractures. Rib deformities occur in some ...