Conversation: The conversation between human and AI assistant.
[|Human|] Hi I have had a small lump behind my ear for a mumber of years. It has never given me any problems but recently it burst and I squeezed out a thick white puss. The lump had gone down slightly since then nbut now I have had a green fluid leaking out. Have i an ifection or is a burst lympth node? Many Thanks
[|AI|]  Hi. You are right. Most of the swellings in this area are lymph nodes. The change over to the green pus is suggestive of another opportunistic bacterial growth and needs a change of antibiotic and needs also the test of Microscopy, culture and sensitivity of the green pus for future help for the most appropriate antibiotic. Confirmation is required from an ENT Surgeon that this pus is not coming from the mastoid bone and may warrant a CT scan too.