Fortunately his seems mild at the moment. The problem is anything could happen lol! It could just go away completely (50% 'grow out of it' by adulthood) or get worse, then better, then worse etc. Stress and excitement exacerbate it.
There are medicines to limit tics, but would rather not use them if possible. And these are only advocated in severe cases. My dad has TS as well and he has never had any treatment. He has achieved everything he ever wanted too.
The neurologist we saw said that it isn't usually the tics that cause the problems with TS, but the associated conditions. DS has OCD with it. If that gets bad, then he can access CBT. A lot of children with TS also have ADHD....DS certainly has traits too.
Personally, I am ok with his dx. (His brother has suspected AS and that is an entirely different story....). As I say the tics aren't a problem at the moment. They are there, but no one has commented on them yet in a negative way. Sometimes they make writing etc hard, and we will deal with it if life gets harder.
By the way TS is very common. They reckon 1 in 100 children have it. It isn't usually as severe as portrayed on the TV. They only show the really extreme cases. The majority of cases aren't nearly as bad. There are plenty of people in the population who have it and don't even realise.