I have a hard lump on my right sternoclavicular joint. It has been there for a couple of months, but seems to be getting bigger. I went to my doctor two weeks ago, and he said it was nothing, just a part of the joint shifting with age. It continues to grow. I don't have a lot of other symptoms. I am always tired, but I work three jobs. I have had some slight nausea here and there, which is unusual for me. The lump is not painful. I did not understand my doctor's explanation, and he did not really even check it out. He touched it for a second, and immediately gave me his opinion. Am I being paranoid? Any ideas?