had a halo for 11 weeks and pain in a pin site is a sign that the pin has come loose from the skull........i spent 5 hours in emerg and they assured me they were fine after retorquing them all......but it was clearly loose on my skull when i got home........they then took it off as the other option was to put in a new pin beside the old one..........mine came off and i get the ct scan a week later.............talk about screwing up the order.........also be prepared for pain when it comes off........its a big adjustment after wearing it a long time.....docs never warned me about that.....i ve been told i ll feel dizzy and crappy a week and then i should feel better.......this by my home care girl who had neck surgery.....docs not so much............anyway hope this helps........sounds like yours will be removed........dont make the mistake i made and not shave or wash your hair......my thinking was i could more easily do it once i had the collar..........and now i have a beard i cant get off under my collar and dirty hair i cant wash.......again docs didnt tell me anything.......so shave........get your hair washed......and you ll be prepared for when it comes off.......hope this helpsView Thread