Sternum pain after open heart surgery usually requires a recovery period of 3 to 6 months, but there are individual variations. In addition, intermittent pain may remain in some cases. Open-heart surgery is performed to treat and diagnose diseases of the heart, lungs, esophagus, or diaphragm, and requires the cutting of the sternum as part of the surgical procedure. Since the sternum is completely cut open, pain and discomfort at the sternum may occur after the surgery. As the sternum heals, the pain will gradually disappear. Generally, the healing of the sternum is similar to the healing cycle of a fracture, and clinical healing takes 3 to 6 months. Therefore, most of the open heart surgery after 3~6 months sternal pain can be basically disappeared. However, due to the different speed of healing of the body, there are individual differences in the improvement time of postoperative pain. In addition, long-term intermittent pain may also remain after open-heart surgery in some cases.