A number of years ago I had crawling/tingling sensations on the top of my head. They persisted off and on for a while and I got a little concerned. I went to my ENT physician and I talked him into giving me an MRI of my brain. For the insurance to pay for it, I had to say I had tinnitus. The MRI was clear and the tingling and crawling sensations were attributed to tension in my neck, back and/or shoulders.