Sounds like a phobia to me, but I'm no expert. Just talking from personal experience. I have a similar problem. I suffer from hypochondria (along with OCD) and social anxiety, so maybe that's why. It happens with strangers, people I don't know well, or people I dislike. For some reason I don't have a problem with haircuts or massages (there might be other situations as well but I'm sticking to what with or without you mentioned because I really can't think of anything right now). I don't know. Maybe it's because I think those are special situations since people are supposed to touch me (so long as it doesn't feel wrong, obviously). I don't get panicky but I react with extreme shock and anger. Last week somebody in class touched my shoulder because they wanted to know what the teacher had said and I was like "WTH!" in my mind. I have some trouble with it because I don't want to be impolite, but it is so annoying. I send hugs as well.