Occasional stabbing pain under the left rib cage is considered to be intercostal neuralgia. The nature of each pain is mostly stabbing, the duration of the pain is short, and the location of the pain is not fixed, which is mainly a local problem of the rib cage. In addition, coronary artery disease and angina pectoris are most common in elderly patients with a history of hypertension and diabetes. During an attack of angina pectoris, there is a stabbing pain below the ribs on the left side, accompanied by chest tightness, shortness of breath, panic, dizziness, and weakness. There are also patients with cardiovascular neurosis, which is common in young people, without a diagnosis of cardiovascular disease, and each time the pain is long and stabbing, with psychotherapy as the main treatment, if necessary, anti-anxiety or antidepressant medication, and if necessary, go to the hospital for further examination.