The largest organ under the left rib cage is the heart, which is responsible for the blood supply to the whole body and is a very important organ, and besides the heart are the lungs, which are used for breathing. After heart problems, patients may experience purple lips, panic, chest tightness, anterior heart pain, and sometimes nausea, and in severe cases of myocardial infarction, radiating pain in the back and left upper extremity. These diseases often occur in middle-aged and elderly people and have a history of cardiovascular disease such as hypertension, and patients should have frequent medical checkups to prevent heart attack. In addition to heart disease, lung disease can lead to clinical manifestations such as coughing, coughing up sputum and low fever. If symptoms occur frequently, patients may choose to visit the hospital for further consultation and confirm the diagnosis by chest X-ray and MRI.