Lump on manubrium of sternum lump under the skin, medium round & been there for over a year. recently been feeling pain in surrounding bones when bend?

Lipoma: Most commonly these are lipomas, which are simply benign masses of fatty tissue. Very rarely do these cause any problems - in rare cases, there may be persistent surrounding inflammation which leads a patient to ask for removal of the lipoma. As with any lesion, if there is significant increase in size, or significant pain, redness, discoloration, or any other concerning sign, do see a physician