Conversation: The conversation between human and AI assistant.
[|Human|] I am really worried about this small hard lump on my left mastoid process. It doesn t hurt until you press it. Its been there for quite a long time. I even clicked a picture of it if you might need to see it for reference. I am very scared. I am just nineteen , what could possibly be the reason for it. Please help.
[|AI|]  Hi, dear. I have gone through your question. I can understand your concern. You may have some reactive lymph node due to infection in that region.  Or you may have mastitis. Just take a course of antibiotics.  If lump doesn't respond to treatment then biopsy diagnosis is advisable.  Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health.