Angina pectoris, commonly known as angina, is a cardiovascular condition characterized by chest pain or discomfort caused by inadequate blood flow to the heart muscle. This discomfort often manifests as a pressing or squeezing sensation in the chest and may radiate to the arms, neck, jaw, shoulder, or back. Angina is typically a symptom of underlying coronary artery disease, where the blood vessels that supply the heart muscle with oxygen become narrowed or blocked. The pain is often triggered by physical exertion, stress, or other factors that increase the heart's demand for oxygen. Stable angina occurs predictably and is usually relieved by rest or medication, while unstable angina is more unpredictable, occurring at rest or with minimal exertion and may signal a more serious and imminent cardiac event. Prompt medical attention is crucial to assess and manage angina, with treatment strategies aimed at relieving symptoms, addressing the underlying cardiovascular issues, and reducing the risk of complications.