Son has it.
Blinks, clamps down on teeth, when he gets a cold he clears his throat for about a month after. When he plays video games he looks like he is trying to push the triangle, circle, square, x button through to the back side.
Magnesium and melatonin seems to help some. But think it might just come and go as he is growing.
Anxiaety is bad for tics, and part of the cycle if you are ashamed of it.