Thanks for writing to us.
The lump that you're talking about is in all likelihood an enlarged lymph node
. It could be enlarged due to a chronic infection in the ear. Since its been there for a long term, I dont think it is a serious issue.
It is pulsatile because it is situated over the major vessels in the neck and you can feel the transmitted pulsations of these vessels
It would be a good idea to see your physician, although you can wait till you have insurance. You may need to undergo a minor surgery of Excision Biopsy
to confirm the diagnosis..
Let me know if you have any more questions.