sharp, stabbing pain under the left breast or in the chest; pain in one or both Lying on the side of the pain can help relieve pain symptoms.
Under and around the left breastbone are the heart, spleen, stomach, sharp, stabbing pain, often on the left side of the chest; sudden onset.
Are you experiencing pain under your left rib? Costochondritis refers to inflammation of the cartilage that attaches your ribs to your breastbone. It causes a sharp, stabbing pain that's usually felt on the left side of your rib.