Final answer:
Chest pain caused by angina pectoris typically occurs during physical activity due to inadequate blood flow to the heart, and is treated by relieving symptoms and managing the underlying condition.
Step-by-step explanation:
Chest pain caused by angina pectoris generally occurs only during body movement, such as exertion from brisk walking or running. This occurs when heart muscle cells do not receive adequate blood flow and become starved of oxygen; a condition known as ischemia. Symptoms such as chest pressure, back pain, neck, shoulder or jaw pain, shortness of breath, sweating, or nausea may accompany this chest pain. Treatment for angina includes relieving symptoms and slowing the progression of underlying atherosclerosis. Additionally, stable angina can improve quickly with rest or administration of nitroglycerin, which dilates the coronary arteries and improves blood flow. However, unstable angina, which is more dangerous and occurs during rest, requires urgent medical attention as it may be a sign of an imminent heart attack.