Tics are really, really common in young boys. I was upset and approached his pediatrician about it and his reply was to watch it carefully. My son had one which we traced to allergy meds if you can believe it. If he was on any allergy meds for a period of time, he ticked. The ticking only occurred in the spring and only during the years we gave him allergy meds. There is absolutely no mention of this sort of problem on any box, on any website or any medical paper that we could find. Our doctor accepted the anecdotal evidence and said to test him by taking him off the meds. Once the meds got out of his system, he was fine and has never ticked again.