When chest tightness occurs, the first thing to consider is whether there is heart disease, and you should go to the hospital in time to improve relevant examinations, such as electrocardiogram, cardiac ultrasound, coronary CT, etc. to clarify whether there is myocardial ischemia. Chest tightness can also be seen in other diseases. Lung diseases such as pulmonary embolism, or discomfort behind the chest caused by digestive system diseases such as gastroesophageal reflux disease, may also present symptoms of chest tightness and chest pain, and be mistaken for heart diseases. Angina pectoris is caused by ischemia of the heart due to spasm of the coronary arteries when the oxygen consumption of the heart muscle increases, resulting in symptoms of chest tightness and chest pain. In addition, chest tightness symptoms can also be seen in physiological situations, such as chest tightness and shortness of breath after emotional excitement, and the symptoms can disappear after the emotional excitement is relieved. In summary, chest tightness can be seen in a variety of diseases, such as heart disease, lung disease, upper gastrointestinal system diseases, etc. Therefore, if the symptoms of chest tightness occur, you should promptly consult with the hospital, improve the relevant examination to clarify the cause, and timely treatment of the cause to avoid the danger.