hello, i have a hard lump on the top of my collar bone that sometimes hurts a little what is it? it also move with the bone as if it attached to my sholder bone
HelloWelcome to Chat Doctor. The lump you mentioned could be a bone cyst or osteomyelitis(infection of bone). It could be a sebaceous cyst, but they are generally not hard. I would suggest you get a X-ray done and consult an orthopedic. An MRI can be done if asked by the orthopedic. Take care.