Can you get sick from sleeping with your hair wet?

No, you will NOT get a cold sore by going to sleep with wet hair. Trust me, the two are related in no way! You have been infected with the simplex 1 virus... thus causing your cold sore to form. Once exposed, you will have the virus for life. It can lie dormant for years though. Don't worry it's not the same as genital ... so no reason to be alarmed. :)