Conversation: The conversation between human and AI assistant.
[|Human|] I have a fairly large (3cm) hard lump that does not move and is completely painless behind my right ear. It is irregular in shape, not red, with no evidence of an opening like you would see with an abcess or pimple. I also have been extremely tired for about 2 weeks. I have not been sick recently but incredibly stressed with grad school and work. What could cause this? Could it be caused by stress?
[|AI|]  Hi, dairy have gone through your question. I can understand your concern. You may have some enlarged lymph node due to reactive hyperplasia, tuberculosis or lymphoma. Or you may have some Desmond cyst or soft tissue tumor or skin adnexal tumor. You should go for fine needle aspiration cytology of that lump. It will give you exact idea regarding cause. 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.