Rib cage pain may be sharp, dull, or achy pain felt at and below the chest and above the navel on either side. It may occur after an obvious injury or without explanation.Rib cage pain can be caused by anything from pulled muscles to a rib fracture.ib cage pain may be sharp, dull, or achy pain felt at and below the chest and above the navel on either side. It may occur after an obvious injury or without explanation.