Clinically, heartburn is usually referred to as chest tightness, which is generally considered to be due to cardiopulmonary diseases or environmental factors. 1. Cardiopulmonary diseases: when patients with coronary atherosclerotic heart disease, old myocardial infarction and other heart diseases or chronic obstructive pulmonary disease, bronchiectasis and other lung diseases, chest discomfort often exists in the chest, can be dealt with through the use of anti-inflammatory, cardiovascular expansion drugs, if necessary, timely medical treatment to take targeted treatment. 2. Environmental factors: when in the underground garage and other air circulation location, or due to the plateau and other low-pressure location will make the cardiopulmonary function of the weaker people produce chest tightness symptoms, this time should be timely adjustment of the surrounding environment, to avoid further deterioration of the situation. In addition, do not rule out due to emotional, psychological and other factors, such as neurosis and other conditions resulting in chest tightness, in short, if the patient has a more serious chest tightness, should be timely medical treatment.