When the Bottom Ribs Aren't Attached to the Breastbone Medically reviewed by Jane Kim, MD Floating ribs are a normal part of human anatomy, but like other ribs, they can be injured and cause pain.

Rib cage pain can be caused by an injury, inflammation, or autoimmune condition. Rib fractures or bruises from injury can cause intense pain, and swelling may occur. Costochondritis is a common ...