Chest pain from heart disease is often located behind the sternum and presents as compressive tightness or burning pain, among other sensations. This pain can radiate to the back, left shoulder, left upper limb, or even to the lower jaw area, lasting from several minutes to dozens of minutes. If it is stable angina, it often occurs due to overeating, exertion, cold, and other causes, and can be relieved by rest or taking sublingual nitroglycerin. If it is unstable angina, it may occur even while at rest, and rest or sublingual nitroglycerin may not effectively alleviate the symptoms.