Conversation: The conversation between human and AI assistant.
[|Human|] have a lump on my trapezius muscle between shoulder and neck it is movable doesn t hurt but is a noticeable lump I use to wear a backpack which weighed quite a bit , all the time and noticed pain on the same side where the lump is now. I suspect that is the reason why I have it any insight is helpful
[|AI|]  Hello! Thank you for the query. It is quite hard to tell not seeing it. Such lump can be a lymph node, lipoma, sebaceous cyst. Lymph node is usually hard, soft and movable rounded structure. Lipoma and sebaceous cyst are soft in touch. Sebaceous cyst can have a kind of small black dot on its surface. The best way to find out what this lump is build of, is to have soft tissues' ultrasound. Hope this will help. Regards.