The left side of the left side of the colon is the transverse colon and the descending colon, and the spleen and pancreas are important organs. Below the chest to the right is the gallbladder and liver, and below the chest are the ribs. If there is pain below the sternum, the first thing to do is to actively identify whether there are any fatal diseases, such as acute myocardial infarction and acute coronary syndrome. In addition, there are also aortic aneurysms in the chest and abdomen and aortic coarctation, which need to be actively clarified and improved. If the pain is severe, it is also necessary to exclude the presence of acute pancreatitis, acute hepatitis, cholecystitis, etc. If the pain is vague, it is necessary to exclude liver cancer and gallbladder cancer as pathogenic diseases. Of course, prolonged pressure on the ribs can also cause pain under the chest, which is mainly caused by the formation of costochondritis.