J.L.
You must try this! It worked for my son....
This very thing happened to my son when he was 7. I did some research online and was saddened to read to think he had Tourettes. He had the throat clearing, a pronounced head bob and an arm flap. He was also blinky.
I learned that magnesium will solve this problem. I went to the health food store and purchased liquid magnesium. I began giving my son 1 tablespoon a day and his symptoms disapeared within 1 week. He still takes magnesium about three to four times a week now and he is fine. If he goes off the magnesium he gets blinky and develops tics again.
You really should try this. It works. Be sure to get liquid chelated magnesium as it it is more readliy absorbed. The liquid mag can be chalky. I mix mine in a little bit of orange juice and its easy to drink.
If you want to email me privatly I would be happy to share more of my experience about this. Magnesium is great for kids with ADHD, restless leg syndrome, anxiety and so much more. Everyone should be getting this vital mineral.