Conversation: The conversation between human and AI assistant.
[|Human|] i have a hard, small knot on the bone behind my ear, and that lymph node is also slightly swollen, it does not hurt, but i am worried. i am 27 years old and never really have any health problems, i weigh 140 pounds and i am a bit of a hypochondriac. I was bitten about 6 times by black flies two days aGO and wonder if that hard lump on the bone behind my ear might also be a gland that has swollen as an immune response?? i am scared about this knot, can you help me?
[|AI|]  Welcome to Chat Doctor .1. The different lumps arise from that region are parotid gland mass lesion, can be mass arising from underlying bone and lymph nodal mass.2. I have no came across the immune reactions acted localized, immune reactions are general generalized reactions.3. To confirmed what it is - you need to get an ultrasound scan done.4. Which will gives the consistent of the lump, and where it is arising from, involvement of adjacent structures.5. You don't have to be scared. Get an appointment and let the doctor examine and come to conclusion with investigations. Anything to ask ? Do not hesitate. Thank you.