Hidden pain above the sternum is usually caused by functional chest diseases, costochondritis, anterior superior mediastinal disease, trauma, etc., and the cause needs to be identified before further treatment. 1. Functional diseases: such as long-term head bowing, fatigue, improper posture and other factors caused by the increase of lactic acid in the muscle tissues above the sternum, or autonomic dysfunction such as cardiac neurosis caused by emotion, anxiety, mental stress, etc., can cause vague pain above the sternum, usually without organic changes in the tissue structure. 2. Costal chondritis: inflammatory disease occurring in the costal cartilage, preferably at the junction of the 2nd and 3rd costal cartilage and sternum, which can be manifested as vague pain above the sternum. 3. Anterior superior mediastinal disease: thymoma, ascending aortic aneurysm and other diseases can compress and invade the tissues behind and above the sternum, causing vague pain above the sternum. 4. Trauma: soft tissue injury or sternal fracture caused by external violence can also cause vague pain above the sternum. It is recommended to go to the hospital for further counseling or treatment for vague pain above the sternum.