I noticed i had lump right in the middle of the back side of my head. Its hard and painless( when i touch it. It doesnt move at all. It acutally feels as if though its part of my skull, as if it were a bone. I had my head x rayed ( a regular hospital x ray) at a hosiptal. The results were : multiple view of the skull show no acute fracture or bone destruction, The calvarium is intact, Impression: unremarkable exam.
Its kind of odd since i have never notice this thing before on my head. I still feel a little worried for some reason.