Sudden chest tightness, shortness of breath and dyspnea may be caused by the lack of air circulation, no treatment is needed. If it is caused by vegetative nerve disorders, spontaneous pneumothorax and other diseases, general measures, medication, other treatments and surgical treatments need to be taken for the cause of the disease. 1. Poor air circulation: If a person stays in a narrow space with poor air circulation for a long period of time, he is prone to sudden chest tightness, shortness of breath, dyspnea and other discomforts, which generally do not require any treatment, and can be relieved by oneself within a short period of time after leaving the current environment in a timely manner. 2. Vegetative nerve disorders: common symptoms include chest tightness, shortness of breath, panic, dyspnea, dizziness and so on. Patients need to follow the doctor’s advice to apply glutamine, vitamin B1 and other drugs to regulate the function of plant nerves, and some patients also need to follow the doctor’s advice to apply propranolol, metoprolol and other beta-blockers. 3. Spontaneous pneumothorax: most of the patients will have sudden symptoms such as chest tightness, shortness of breath, chest pain, dyspnea and so on when exercising or changing position, and usually have a history of pulmonary alveoli. Patients need absolute bed rest, semi-recumbent position, continuous low-flow oxygen under the guidance of the doctor. If the symptoms are severe, closed chest drainage and thoracentesis should be considered. If the above treatments are ineffective, open thoracic surgery and laparoscopic surgery should be chosen. Sudden chest tightness, shortness of breath and dyspnea may also be seen in other diseases, such as allergic asthma, coronary heart disease, etc., and should be promptly to the hospital, and actively treat the primary disease. The above drugs should be used under the guidance of a physician.