Is the crawling occurring on the surface of your skin? If so, go with the Scabdraggr solutions: Tinactin cream used like hair gel. This is decently helpful, cuts maybe 50% of crawling for a few hours. Much better is a liberal coating of Aim or Colgate white toothpaste coating the entire scalp, left on all day. Obv this second treatment isn't very conducive to one's social life.
Shave your head. Anything longer than #1 is unnecessary Morgie torture for guys.
If the sensation is under the skin I dunno.

What I did that cured my crawling scalp was to get into a bath as hot as I could stand it with Epsom Salts , borax and apple cider vinegar. I put all but my hose underwater and held it there as long as I could. Stay in the bath as long as possible. It was hot, so I had to get out for a minute or two to cool my body temp down once in awhile, but I stayed in for a half hour. I did this every night for a week, and my itchy-crawly feeling in my scalp stopped. Try the no-poo shampoo method. Google it. Use borax and apple cider vinegar as the rinse. It really does help.