Conversation: The conversation between human and AI assistant.
[|Human|] Hi, I have a hard lump behind my ear (2cm diameter), where the head joins the neck. It feels like it is bone, sticking our from my skull. When I lie down I feel dizzy and need 2 or 3 seconds to get my bearings. I had an xray and the radiologist has asked me to come back for a CT scan. Any indication of what this may be? Thankyou
[|AI|]  Hi Dear, Welcome to Chat Doctor. Understanding your concern. As per your query you have lump behind the ear are pointing towards a condition known as cyst or a Sebaceous cyst. These sack-like lumps are made up of dead skin cells and oils produced by oil glands in the skin. It could be due to pressure and impingement of nerve endings. Need not worry. You should avoid touching or pricking it with any sharp object. I would suggest you to consult ENT specialist for proper diagnosis. Doctor may order certain tests like audiometry, CT scan, manometry and do physical examination to rule out condition like lymphadenopathy. If a cyst becomes painful, it may be infected. Treatment may include antibiotics or removal of the cyst. For now give warm compresses to affected area. Hope your concern has been resolved. Get Well Soon. Best Wishes,