Chest pain can arise from many causes, ranging from mild to serious. One common reason is muscle strain, often due to heavy lifting or overexertion. Heart-related issues, such as angina or a heart attack, are more serious causes and require immediate attention. Acid reflux or GERD can create a burning pain that mimics heart discomfort. Lung problems, including pneumonia, pleurisy, or a collapsed lung, may also cause sharp chest pain. Stress and anxiety can trigger intense chest tightness or pressure. Because chest pain has many possible sources, identifying the exact cause is essential for proper treatment and safety.