Hi,I have a lump on the back of my head, about 3 months and more now. It burns, I get headaches, and it itches if touched. I am sometimes nauseas. I have taken medication 2 times for lymph nodes being enlarged (doctors assumption). He says he cannot feel the lump I have but just gave me them any ways. They did not help in any way.I am not sure what it is, please help me.