Heart Attack
Sudden pain on your left arm is a sure indication that you are suffering from a heart attack. The pain could get intense within a short time. But how does it cause left arm pain? A simple explanation points at the blood clot or accidental rupture of your coronary artery stopping the flow of flood to a certain section of your heart. In the process, the muscles are likely to get damaged and if not treated in time, the heart muscles start dying gradually triggering pain on your left arm. [8]
