There is a hard lump under the raphe that has been growing for more than 2 years, which is a normal phenomenon, related to bone calcification, regular review can be, do not need to worry too much. If there is any discomfort, please go to the hospital for treatment as soon as possible. Generally speaking, the bulge of the raphe is in the shape of a rounded ball, which is a normal structure of the bone tissue, and is not due to abnormal damage or deformed development of the bone tissue. In the event of an accidental impact or compression, the projections may break and affect the support of the sternum. In addition, as you get older, you may develop calcification of the raphe, which may feel like a hard bump to the touch, and calcification of other joints and bones, which is normal and not a cause for concern.