Conversation: The conversation between human and AI assistant.
[|Human|] I have a painful bony lump on the back right side of my skull.  It is near the bottom of my skull (bottom right of my occipital bone) where the occipital vein runs.  It feels like a bony lump, and causes numbing dull pain.  When I touch it the pain is not extreme but it does feel like a bruise would.  I have not hit my head on anything, it just came out of nowhere.  What could this be?
[|AI|]  Hello! Welcome to Chat Doctor. From history & as you said it is bony hard, it is more likely an asteroid Osceola i.e. a benign lesion. In my clinic, I advise X-ray skull to know if any intracranial extension is there or not. Usually no surgical intervention is required.Painkillers can be taken, if pain increases. Look for sudden increase in size. Local examination once by your doctor is advisable. Hope this information is useful to you. Wish you good health. Thanks. Regards.