Hmmm, that could be serious. How did you get the lump? Are you sure its not cancer? It could an early sign of a tumor developing. I don't want to scare you and I am not sure what it is but it could be a sign of cancer. So I suggest that you seek professional advice. There are so many tests that are available these days and you can easily identify cancer. But it might be just a lump of fat or something like that. That can easily be removed with the help of an operation. Hope that answers your question.