Chest tightness caused by myocardial bridges can be triggered by physical load or emotional excitement; its episodes are mostly characterized by paroxysmal episodes, and the whole process usually lasts for 3 to 5 minutes, while severe episodes can last for 10 to 15 minutes, and more than 30 minutes is relatively rare, and it can be relieved quickly by removing the triggering cause, or by taking nitrate medication under the tongue, which can relieve angina pectoris in 1 to 3 minutes. Myocardial bridge refers to: if a section of coronary artery walking in the myocardium, then this bundle of myocardial fibers that is known as myocardial bridge, due to the wall of the coronary arteries in the heart systole is compressed, long-term compression, mostly in middle age after the emergence of myocardial ischemia symptoms. At this time, its clinical symptoms can be manifested as: angina pectoris nature of chest pain, chest tightness, arrhythmia, pain or discomfort is often located in the sternum or near the sternum, accompanied by squeezing pain and choking sensation, can be radiated to the shoulder and the face, and is sometimes mistaken for shoulder joint disease and periodontal disease. Patients who experience prolonged chest tightness, chest pain that is not relieved by rest or medication or other related discomforts should go to a specialized hospital to avoid delayed treatment.