Patients often ask: I had surgery for my heart disease, and the doctor said it was successful and the tests were good, so how come I am still uncomfortable, even more so than before the surgery. This is the patient’s lack of knowledge about the disease and the surgery. Before analyzing the causes, first of all, it is explained that surgery is only part of the work to treat heart disease. Surgery only addresses the underlying lesions of heart disease, such as valve replacement, defect repair, deformity correction, bypass, and replacement of blood vessels. And the structure and function of the heart and other organs previously caused by these underlying lesions can never be restored temporarily or partially, so that various discomforts occur. Therefore, postoperative medication is very important. The common causes are categorized and explained below. I. Changes in the structure of the heart, such as atrial ventricular enlargement and myocardial hypertrophy due to valvular disease and congenital malformations, myocardial fibrosis and myocardial necrosis due to coronary artery lesions. Second, changes in heart rate and rhythm, for example, rapid heartbeat, slow heartbeat, arrhythmia, atrial fibrillation, etc. Third, followed by cardiac insufficiency, feeling chest tightness, weakness, easy fatigue, fatigue, dizziness, etc. Other organ function abnormalities caused by heart, such as: pulmonary hypertension, pulmonary stasis, pleural effusion, pleurisy, pneumonia, abdominal organ stasis, liver insufficiency, kidney insufficiency, etc. V. Side effects due to surgery, such as: incisional skin pain, incisional skin tightness, pain around the sternum, rib pain, shoulder pain, discomfort after recovery of heart structure, scalp numbness due to postoperative bed rest, limb discomfort, low back pain, etc. Sixth, psychological barriers, there are some people always feel as if the surgery is not done, associated with such and such discomfort, is a psychological effect.