If you have pain below the left rib cage, you can register with the Department of Gastroenterology or Cardiothoracic Surgery, because digestive system diseases and heart diseases may have this symptom, such as the following cases: 1. chronic cholecystitis, in addition to the pain below the left rib cage, there will also be nausea, vomiting, abdominal distension and other symptoms, and after eating these symptoms will be more obvious, you can go to the hospital to do abdominal ultrasound to confirm the diagnosis. 2, Gallbladder stones, if there are stones in the gallbladder, you will feel discomfort in the abdomen and pain below the left rib cage, if the stones are large and block the neck of the gallbladder, the pain will be more obvious, and you need to go to the hospital for abdominal ultrasound to confirm the diagnosis. 3, gastritis, in addition to pain below the left rib cage, there will also be nausea, vomiting, poor appetite and other symptoms, you need to go to the hospital for gastroscopy to confirm the diagnosis. 4, heart disease, such as coronary heart disease, myocarditis, angina pectoris and other symptoms, 4, heart disease, such as coronary heart disease, myocarditis, angina pectoris, etc., need to go to the hospital to do CT, cardiac ultrasound, electrocardiogram and other tests to confirm the diagnosis.