It’s not that the symptoms are necessarily gone, it’s just that they are less seen by the public. Sometimes, it’s not that a person is losing the condition as they become adults, but that they have had accepted this about themselves and learned to cope in public as they became more in control of their environment.
Although you can’t physically always see Tourette’s (and its most definitely not well understood by the public) it is very much like a physical disability in the way a person would perfect the art of hiding the condition to the best of their abilities in public, yet you will always feel different from everyone else.
Along with Tourette’s, I also have HF-autism and dyslexia – so I was called an odd child. I was never actually diagnosed with Tourette’s. When I was little, I was a fidgety, mumbly kid; the youngest of 5, not noticed much, and I didn’t talk until I was almost 4 years old. I noticed Tourette’s profound presence after I had my daughters. My solution was to simply not go out much. I went to work, took stocking jobs and cleaning jobs that allowed me to be independent and I only socialised with my family.