You can Google "tics" for more information. Here are some links --
http://en.wikipedia.org/wiki/Tic
http://www.tourettes-disorder.com/symptoms/tics.html
http://www.childbrain.com/ticdisorder.shtml
Tic is quite normal in boys (28% ?). Normally, it will go away. When it happens, don't force child to stop (as far as it is not dangerous). A more relax the environment, good sleep and balanced nutrition will help.
http://en.wikipedia.org/wiki/Tic
http://www.tourettes-disorder.com/symptoms/tics.html
http://www.childbrain.com/ticdisorder.shtml
Tic is quite normal in boys (28% ?). Normally, it will go away. When it happens, don't force child to stop (as far as it is not dangerous). A more relax the environment, good sleep and balanced nutrition will help.