If patients have chest tightness in the morning, it is usually related to the following factors: 1, organic lesions of the heart, such as coronary heart disease, unstable angina, myocarditis, hypertensive heart disease, pulmonary heart disease, rheumatic heart disease, hypertrophic obstructive heart disease, will have symptoms of chest tightness due to insufficient blood supply to the coronary arteries. 2, respiratory system diseases, such as chronic bronchitis, chronic bronchial dilatation 3, cardiac neurosis, when the plant nervous system is disturbed, there will be chest tightness, shortness of breath, palpitations and discomfort in the precordial area in the morning. 4, endocrine metabolic diseases, such as thyroid dysfunction, will also have symptoms of chest tightness in the morning.