Angina is a type of chest pain that occurs when the heart doesn't get enough oxygen-rich blood. It often feels like pressure, squeezing, or a heavy weight on the chest. People may also experience discomfort in their arms, neck, jaw, or back. Angina is usually triggered by physical activity, stress, or extreme temperatures and can be a sign of underlying heart issues, such as coronary artery disease. There are two main types of angina: stable and unstable. Stable angina happens during physical exertion and goes away with rest, while unstable angina can occur at rest and may last longer, indicating a more serious condition. If someone experiences angina, it's important to consult a healthcare professional for proper evaluation and treatment.