The pain in the lower part of the left rib cage when you move may be a bad symptom caused by costochondritis, pancreatitis, pneumonia and other diseases will also have this kind of discomfort, you need to go to the hospital in time for relevant examinations. 1. Costal chondritis: Costal chondritis is a symptom that usually occurs in persistent pain, and the pain is more pronounced when you make a large movement or cough violently, the condition will recur, and some patients will have redness and swelling of the local skin. 2. Pancreatitis: The pain in the lower left rib cage can be caused by pancreatitis, and the patient may also experience nausea, vomiting, abdominal distension and other symptoms, which may also lead to indigestion, and some patients will be accompanied by fever. 3. Pneumonia: Pneumonia may also cause this kind of discomfort, usually accompanied by fever, cough, chest tightness and shortness of breath and other symptoms, the patient will be afraid of the cold, the seriousness of the disease will cause respiratory distress. In addition, the left side of the rib cage hurts when you move, may also be caused by trauma discomfort, after a strong impact may cause local skin damage. These symptoms should be treated under the guidance and advice of a doctor to find the cause of the problem and avoid delaying the condition.