In addition, if the patient has chronic respiratory diseases, such as chronic obstructive pulmonary emphysema, chronic pulmonary heart disease, or pulmonary hypertension, these conditions may also lead to chest tightness, shortness of breath, and precordial discomfort every morning; 3, if the patient has a clear previous disorder of vegetative nerve function, or if the patient has obvious cardiac neurosis; 4, in the case of endocrine system disorders, or in the case of autonomic nervous system disorders , there will also be symptoms of chest tightness, shortness of breath, and precordial discomfort every morning when waking up.