Conversation: The conversation between human and AI assistant.
[|Human|] HiI have a lump behind my right ear. Ive had an ultrasound and am now being sent for a CT scan. Ive started to get pins and needles in my right arm and hand and my jaw gets tired easily when Im eating. Ive just got blood test results back too. Im really worried.
[|AI|]  Hi. The lump behind the ear is mostly due to a lymph node. Rarely it can be due to infection of underlying mastoid bone or a sebaceous cyst or a lipoma or very rarely hematoma. You would have noted any local symptoms like pain, redness behind the ear, if these are not there and there is no history of mastoid surgery or trauma, there is less to worry about it and this being noticed incidentally. Your symptoms of pins and needles on the right arm and hand can be due to co-existing cervical spine problem. Jaw getting tired easily on eating can be due to other reasons. Anyway it was a good decision to get the tests done. Let us wait for the results, till then you can relax. As stress will increase the muscular spasms and symptoms of arm, hand and jaw. Please let us know the reports and other symptoms if you have for us to guide you further.