What Could Cause Chest Pain That Radiates to the Left Arm?

When you experience chest pain that radiates to your left arm, it is often a signal that your heart might be in trouble. This type of pain is a common symptom of a heart attack, or myocardial infarction, where part of the heart muscle isn't receiving enough blood and oxygen. The nerves supplying the heart and the left arm share similar pathways, so pain from the heart often travels along these nerve routes, causing discomfort in the arm, shoulder, or even the jaw. Coronary artery disease, which narrows or blocks the coronary arteries, is a frequent culprit behind these symptoms. While other conditions can sometimes mimic heart-related pain, left arm radiation combined with chest pain is regarded as a strong warning sign for heart issues. If you experience chest pain radiating to your left arm—especially if it's accompanied by other symptoms like shortness of breath, sweating, or nausea—it is crucial to seek medical care right away. Immediate evaluation by a healthcare professional can help determine the cause and guide the proper treatment to protect your heart health.