If there is vague pain below the left rib cage, clinically it is usually caused by the following factors: 1, angina pectoris in patients with coronary heart disease: coronary heart disease is short for coronary atherosclerotic heart disease, that is, the most important blood vessels responsible for supplying blood and oxygen to the heart, the coronary arteries are affected by atherosclerosis, resulting in serious narrowing or even occlusive lesions in the coronary arteries. When patients with coronary artery disease are emotionally stressed, anxious, excited, angry or even frightened, myocardial oxygen consumption will increase significantly, while patients with coronary artery disease will also experience an increase in myocardial oxygen consumption during strenuous exercise. Due to the existence of serious lesions in the coronary arteries, blood and oxygen supply cannot be supplied in a timely and adequate manner, which may lead to myocardial ischemia induced angina attack in patients with coronary heart disease. A typical angina attack is pain in the precordial area, behind the sternum and in the left side of the chest, which can be colic, dull pain, and vague pain below the left rib cage, which may be an angina attack; 2. Disorders occurring below the left rib cage: such as The patient should go to the pain clinic for further diagnosis.