Coronary heart disease can cause chest tightness. Coronary heart disease is atherosclerotic heart disease of the coronary arteries, the typical symptoms are chest pain, chest tightness and shortness of breath. 1. Chest pain: that is, angina pectoris, coronary artery atherosclerosis caused by narrowing of the blood vessel lumen, resulting in a decrease in the blood supply to the heart muscle, the heart does not consume much oxygen at rest, there may be no symptom, but when the exercise or emotional excitement, the oxygen consumption of the heart muscle increases, and the narrowing of the coronary arteries supply is insufficient, angina pectoris will be produced. 2. Chest tightness: a feeling of pressure and suffocation in the chest, which may be accompanied by profuse sweating and a sense of suffocation. 3. Shortness of breath: myocardial ischemia leads to a decrease in pumping function, which results in ischemia and hypoxia in all organs of the body, which reflexively excites the respiratory center and causes shortness of breath. When patients with related symptoms, suspected of suffering from coronary heart disease, must promptly go to the hospital for examination, once diagnosed to immediately start formal treatment, so as not to delay the condition.