Patients who have pain symptoms near the heart when breathing: 1. First of all, patients with serious diseases of the respiratory system, such as tension pneumothorax, open pneumothorax, traffic pneumothorax or infections of the chest, such as acute bronchitis, massive pneumonia, pleural effusion, pleurisy, will have pain symptoms near the precordial area with breathing; 2. For cardiogenic diseases, such as coronary heart disease, un 2, for cardiogenic diseases, such as coronary artery disease, unstable angina, acute coronary syndrome or when the patient has acute myocarditis, pericarditis, cardiac tamponade, infective endocarditis, there will also be pain near the precordial area with breathing; 3, for diseases of the chest wall, such as intercostal neuralgia, herpes zoster pain, there will also be pain in the above mentioned areas; 4, and finally for some patients with cardiac neurosis, there will also be pain when there is a disorder of vegetative nerve function symptoms.