Patients always have chest tightness, shortness of breath and want to take a deep breath, which can be seen in both physiological and pathological causes, as follows: 1. Physiological causes: Physiological causes are more complicated, including poor ventilation of the environment, mental stress, lack of sleep, emotional depression, etc. Most of them can be relieved naturally through rest and regulation. 2. Pathological causes: Pathological causes are mostly seen in respiratory diseases, cardiovascular diseases, such as bronchial asthma, chronic obstructive pulmonary disease or the presence of coronary heart disease. Cardiovascular diseases, such as bronchial asthma, chronic obstructive pulmonary disease or the presence of coronary heart disease and other diseases, can cause chest tightness, shortness of breath, want to breathe deeply, you need to improve lung function, electrocardiogram, cardiac ultrasound and other related tests in a timely manner, to clarify.