My 7 year old ds2 has developed a tic, he moves his head forwards a few times and says that although he knows he's doing it he just can't stop himself. The other kids at school have started to notice. This is the last thing he needs as isn't the most popular boy at school and is justing getting over a really terrible few months of zero friends. Has any one got any experience of tics? All I know is they are very common and can just dissappear. But how long do they hang around for??