I have a lump
on the right side of my neck, right at the base of the hairline
. When I noticed it about 6 months ago it was roughly the size of a dime, hard, not attached to the skin, and whenever I touched it, I got a headache. I also have general neck stiffness, and frequent headaches.
Now the lump is about the size of a silver dollar, takes up most of the right side of my neck, and it is flat, hard, and whenever I try to turn my head, it hurts.