Conversation: The conversation between human and AI assistant.
[|Human|] Hi. About 4 months ago a skin colored lump developed on my upper back.  It almost looked like a pimple.  It never went away and a few weeks ago it became red, hard and painful. It no longer hurts but is a blue-gray colour and is sensitive to the touch.  I have never had this before. What could it be?
[|AI|]  Hi, dairy have gone through your question. I can understand your concern. You may have some cyst, abscess or soft tissue tumor like lipoma, neurofibroma or dermatofibroma. 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.