Conversation: The conversation between human and AI assistant.
[|Human|] My Mom was diagnosed with hives a year ago however in the past two months she has been getting big lumps on the back of her head that seem to come and go.  She said they kind of hurt but only last a couple days and are gone but then will return in a few days.  Shes had a bunch of blood tests but nothing shows up and they cant seem to determine what it is.  Do you have any idea what it could be?  No one seems to know and its very frustrating for her.  Your help would be greatly appreciated.  Thanks!
[|AI|]  Hi, dairy have gone through your question. I can understand your concern. She may have enlarged occipital lymph node or some benign cyst like Desmond cyst or some skin adnexal tumor. She should go for fine needle aspiration cytology or biopsy of that lump. It will give you exact diagnosis. Then she 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.