Consider cyst, subluxation of sternoclavicular joint, osteophyte, etc. Conservative treatment or surgery can be taken according to the cause. 1. The bulge in the sternoclavicular joint may be a cyst, which is formed because of the parcel of fluid in the joint. If the cyst is relatively small and there is no pain, there is no need for special treatment. If the cyst is large and painful, surgery is needed to remove it. 2. If the sternoclavicular joint is dislocated, usually there is a clear history of trauma, need to carry out incision and restoration of internal fixation, need to rest for 2 months after the operation, carry out functional exercises, full recovery usually takes 3 months. 3. Bone proliferation: you can follow the doctor’s instructions oral anti-osteoporosis drugs, such as anti-osteoporosis pills or bone fairy tablets. So the sternoclavicular joint bulge, you need to go to the hospital to check the cause of the disease, and follow the doctor’s advice targeted treatment.