Conversation: The conversation between human and AI assistant.
[|Human|] Hi - I have had a large bony lump at the back of my head slightly above the ear on the right side. It is about an inch round and 1/2 inch deep. I noticed it at least a couple of years ago though it may have been there longer. I have now started to get swimmy sensations in the same area. Should I get this checked out?
[|AI|]  Hello! Thank you for the query. Such lump can be a lymph node, lipoma or sebaceous cyst. Lymph node can be present in this area due to some inflammation in close neighborhood like ear infection, tooth infection. Lymph node is usually soft, hard and movable structure located under the skin. It does not cause pain. Lipoma or sebaceous cyst should be also considered. Both are benign lesions which does not increase cancer risk. To determine what you are dealing with, I suggest you to have an ultrasound of this area done. In case of enlarged lymph node, hematologist should be consulted. Lipoma or sebaceous cyst can be removed by a surgeon. Hope this will help. Regards.