Pain under the left rib cage can be a sign of a heart attack, which is a medical emergency. An enlarged or ruptured spleen, which may result from trauma, can cause sharp pain. Kidney infections can ...

If it feels like your rib cage is literally expanding during pregnancy, that's because it is — and it can hurt.

Dear Doctors: I was in a car accident, and an X-ray showed I had two broken ribs. A second X-ray taken a month later showed I also had a cracked rib. Why didn’t that show up the first time? Why isn’t ...