Conversation: The conversation between human and AI assistant.
[|Human|] A bump on the back of my head appeared today.  Its a few inches behind my left ear, about the size of a nickel, and hard.  I dont feel fluids in there so I dont think I bumped my hear or anything.  I have no idea what to think this is.  It will be a week or so before I can get an appointment.  Do I need to be worried?
[|AI|]  Hi, dairy have gone through your question. I can understand your concern. You may have some enlarged posterior cervical lymph node or soft tissue tumor or skin adnexal tumor. You should go for fine needle aspiration cytology or biopsy of that lump. It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health.