5 year old lip licking
Paula, his tics are pretty typical of TS. Of course, not knowing your son, we can't tell you that he definitely has it. But I agree with Steve that you need to try and get him diagnosed. Because then you'll also have access to services he might need, and you can tell his school what the problem is.
Unfortunately, if your son notices your embarrassment, he might get upset, and he'll try to stop the tics. And the more he tries, and realizes he is doing something that upsets you, the worse the tics might get. The best thing to do is to ignore them completely (I know, it's hard to do).
German citizen, married to a Canadian for 28 years, four daughters, one son, eight grandchildren (and one on the way).