If a patient has recently developed clinical symptoms of deep breathing, the following factors should usually be considered: 1. The most common factor is cardiogenic, whether it is coronary artery disease, unstable angina, or myocarditis, pericarditis, endocarditis, or valvular disease of the heart and other factors leading to inadequate blood supply to the heart, the clinical symptoms of deep breathing will often occur. 2. Pulmonary factors, if the patient has recently developed lung infection or obvious lobar pneumonia, accompanied by pleural effusion, etc., or if the patient has obvious pneumothorax, it will also lead to the need for frequent deep breathing due to dyspnea. 3, in some chronic obstructive pulmonary diseases, such as bronchiectasis, chronic bronchitis, chronic obstructive emphysema, there will also be frequent deep breathing.