Hello, my son has tics & has had Tourette’s. He had lots of allergies as a baby - tomatoes, sugar, laundry powder etc.
Have you breastfed your son? If so it could be something in your diet that is passing through your milk. I kept a food journal for my son. It took about 2 weeks to work out what was irritating him.
He still has tics today at 17, but they are intermittent. He was homeschooled up to 14 & then went to college. I think being well hydrated, sugar free (he doesn’t choose to do this himself sadly), and eating fresh foods all helped him. I can’t control what he eats now as he’s 17 & earning ££.
I found a book called Natural Remedies for Tics & Tourette’s helpful.