There are many reasons that cause chest tightness and breathlessness when lying on the side, and the typical reasons are roughly categorized into cardiovascular system problems, respiratory system problems and so on.
1. cardiovascular system problems: if the patient side lying down on the breathlessness symptoms may be due to heart failure, coronary heart disease, both diseases can cause insufficient blood supply to the heart, myocardial hypoxia, chest tightness and breathlessness symptoms, pulmonary heart disease, the first symptom of chest tightness and breathlessness.
2. Respiratory diseases: the respiratory diseases that can cause chest tightness and breathlessness when lying on the side are pneumothorax, pleural effusion, pulmonary vascular embolism, respiratory failure, etc.; no matter it is open type, tension type or closed type pneumothorax, the typical symptom is chest tightness and breathlessness and dyspnea, in addition to chest tightness and breathlessness of pleural effusion, there will also be chest pain; pulmonary vascular embolism, the typical symptom is dyspnea, shortness of breath, and so on.
If the patient is lying on the side or other positions when the chest tightness and breathlessness should be vigilant, and promptly to the professional hospital to seek medical treatment.