If a patient feels pain in the heart spontaneously during inspiration: firstly, cardiogenic diseases such as coronary artery disease, myocarditis, pericarditis, heart valve disease, hypertrophic obstructive cardiomyopathy, dilated heart disease should be taken into consideration, and these conditions will present pain in the heart during inspiration. Second, for diseases of the respiratory system, such as acute attacks of chronic bronchitis, acute attacks of asthma, severe lung infections, and pneumothorax caused by various factors, such as tension pneumothorax and traffic pneumothorax, these conditions can also lead to cardiac pain with inspiration. Then, for patients with intercostal neuralgia and herpes zoster pain, there will also be pain in the heart with breathing gas. Finally, for patients with vegetative nerve disorders, the above clinical symptoms can also occur once cardiac neurosis is present.