G'day,
I hadn't posted before because I don't really have anything to add. I'm really pleased to hear that your son finds it so beneficial. The nearest my son's ever been to a chiropractor was years ago when his tics were quite severe and he was having terrible migraines as well. He used osteopatic techniques to help with the migraines rather than chiropractic. No manipulations. It seemed to relax my son a lot but didn't affect the tics in any way pos. or neg.. I do know an adult who has TS who says she finds chiropractic very beneficial. I can sort of understand the principle that if one area of the spine is unbalanced or 'blocked' in some way then it would affect the stability of the rest and so forth... domino effect, however, I have absolutely no knowledge or idea of how that affects blood flow which would in turn affect chemistry. Perhaps looking into shiatsu pressure points or acupuncture points might elicit some ideas that overlap with the chiropractic.

Glad it's helping your son, Cheri. I hope that continues to help.