The sternum is a long, flat bone that's located in the middle of your chest.

Is sternum pain serious?

While sternum pain is not usually serious, there are some causes of sternum pain that require immediate medical attention. A person should seek emergency medical attention if the pain: started as a result of direct trauma. is accompanied by heart attack symptoms.

Why does the bone between my breast hurt?

Costochondritis is the most common cause

The most common cause of sternum pain is a condition called costochondritis. This occurs when the cartilage that connects your ribs to your sternum becomes inflamed. Symptoms of costochondritis include: sharp pains or aches on the side of your sternum area.