Pain under the ribs is commonly associated with respiratory diseases, such as pneumonia, pleurisy or pleural effusion, patients may be accompanied by fever, cough, sputum, shortness of breath and other symptoms, it is recommended to do a chest X-ray or lung CT examination, in order to clarify the diagnosis. The left side of the ribs below the pain also need to consider coronary heart disease, coronary heart disease, including angina pectoris and acute myocardial infarction, need to pay attention to the nature of the pain, location and duration. Generally, coronary heart disease pain is burning or squeezing pain, for the pain time, if angina pectoris, generally the pain lasts a few minutes, acute myocardial infarction pain lasts longer, generally more than 15 minutes, or even up to a few hours, the degree of pain is angina pectoris than acute myocardial infarction is light, it is recommended that an electrocardiogram or myocardial enzyme profile test, in order to make a definitive diagnosis. Pain under the left rib cage should also be considered gastritis, gastric ulcer and other diseases, can also cause pain in this area, accompanied by nausea, vomiting, acid reflux, belching and other symptoms, if necessary, can be done gastroscopy, in order to clarify the diagnosis. The right side of the ribs below the pain also need to consider the liver and gallbladder system diseases, such as cholecystitis, gallbladder stones, etc., you can do the liver, gallbladder and spleen ultrasound, in order to clarify the diagnosis.