Pain at the joint of ribs and sternum may be related to trauma, costochondritis, cold, tumor malignancy and other factors. 1. Trauma: If the chest is stimulated by external factors such as extrusion, collision, friction, or due to chest expansion exercise, resulting in local muscle strain, it can lead to injuries to the ribs and sternal joints and other parts of the chest, causing pain and pain. 2. Costochondritis: Costochondritis is generally associated with viral infection, joint ligament injury, low immunity and other factors, which can cause pain in the costochondral or thoracic cavity. 3. Cold: if the chest is stimulated by cold air or cool water, it will make the local soft tissue spasm and the blood circulation is not good, which can lead to metabolic disorders and cause pain in the ribs and sternal joints. 4. Tumor malignancy: if there is a tumor in chest cavity or ribs, and the tumor develops malignancy, it will also cause pain in ribs and sternal joints, so you should have regular checkups to observe the change of the condition in time. If there is pain in the joint of ribs and sternum, you should go to the hospital for examination in time, clarify the cause of the disease and standardize the treatment.