There are 24 ribs in total, 12 on each side of the body. The following are emergency causes of pain under the left rib cage: ...

Most rib fractures are treated with rest ... Symptoms often feel like a heart attack—including pain that radiates under the left side of your breast, Dr. Cutler says. Like a heart attack ...

But when you have pain under your ... cartilage that connects a rib to the breastbone, the Mayo Clinic explains. It usually impacts the upper ribs on the left-hand side of your body and can ...