Conversation: The conversation between human and AI assistant.
[|Human|] I have this knot on the front of my fore head and it comes one day and is goen the next so its hard to get a doctor to look at it. its hard and evenrything like i bumped my heaad but it doesnt hurt and is in the same place everytime. what is it?im only 14 and im scared
[|AI|]  Hi! This peculiar kind of disappearing lump on your forehead needs a physical examination, first! However, as per your description, I must consider few possibilities in your case as follows:1. A lymphocyte or collection of lymph within a sac2. A Desmond cyst3. A hemangioma4. A herniation of underlying structures through a bone defect! Therefore, you need an x-ray or USG of the region for a diagnosis; see a surgeon or physician. Take care!