Conversation: The conversation between human and AI assistant.
[|Human|] So I have a scab on my head for about 3 years now and it just wont go away! And I also found a very large lump today behind my left ear just above my jaw bone but the lump feels like a bone is sticking out of its place it is not supper painful to touch but kinda feels like when you touch a bruise. I also have been getting really bad head aches and  such my hands go numb some times not very often are all of these connected if not what are they? Should I be concerned?
[|AI|]  Hello and welcome to Chat Doctor, The lump behind the ear and above the jaw can be due to lymph node enlargement or salivary gland enlargement. You need to consult an ENT specialist for clinical examination and relevant investigations. Ultrasonography will reveal the origin of the lump-lymph node, salivary gland or bone of the jaw. Aspiration cytology of the lump will sample the cells of the lump. The cells are aspirated with a needle, spread on a slide and stained. This investigation will determine the origin and nature of the lesion. Further management will be determined by result of the investigation. Headache can be associated with the lump behind the ear. Numbness of the hands suggests a neurological disorder. You need to consult your physician for clinical features, investigations, diagnosis and management. Thanks and take care Chat Doctor.