My son had his first bout of tics around 9, I think. He has a new one that involves eye rolling and shuddering. I don't know if there is anything that helps, but I can tell you that for my son, asking about it or drawing his attention to it makes it worse, so IMHO, you are right to tell the teacher not to bring it up anymore. In the past, my son's tics have always just gone away on their own. I'm hoping they will again, too.
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Mom to 2 exceptional atypical kids
Long BAP lineage