I've been feeling for a while that something is crawling on my face and hair , and whenever that happens , I just scratch my skin or hit the place slightly to kill the bug , but of course , there was never a bug to begin with , which is driving me crazy, also the feeling is always on the exact same place , it's always on the right side of my head ,like , behind my right ear , and on my right cheek ! I don't know if this is serious or not , but it's bothering me allot because it's been going on for a while now ( as in a few months ! ) does anybody know what this is ?