Bone pain inside the chest may be due to the following reasons: 1. It may be due to trauma to the chest, usually with a clear history of trauma, such as being hit or crushed, and local soft tissue strain of the rib cage after moving heavy things with force. Usually, in addition to local pain, if there is a fracture, there is also a positive thoracic extrusion sign. 2. Tumors of the bones of the chest, commonly found in the ribs or the sternum, and there is local swelling and protrusion, and the pressure is hard. In both cases, the diagnosis can be confirmed by chest X-ray or chest CT. 3, there is a possibility of chondromalacia of the thoracic ribs. There is articular cartilage inside the sternocostal joint, and aseptic inflammation in this area will cause local swelling and pain, and in severe cases, there will be flushing of the skin and increase in skin temperature, and the pain will increase when breathing hard and deeply or when the thorax is active.