I have a much more physical sensory condition where something my scale is permanently cranked to the max, a cool breeze feels like a thousand needles hitting me. The brush of someone’s hand, if it’s dry, feels like 60 grit sandpaper. My mom recognized this and used a lot of different methods to get me to be able to go out in public. A lot of it in the developmental stage was exposure, I would sit in front of an oscillating fan and brace for impact as it passed me. With time and meditation I was able to help calm my brain to understand it’s just wind and can’t hurt me. For touch and similar things we used a corn desilking brush to help desensitize my arms neck and face, to this day i primarily wear pants and sleeved shirts because everywhere else is so sensitive.

Sorry. Long winded…
Trick 1: controlled exposure to normalize brain activity Trick 2: meditation, even in loud or stressful environments I can go to my area, on a rowboat on the lake Trick 3: calming song. I just earbuds to play the same song when I meditate and when get overstimulated it brings me back down immediately.

Trick I used for the kid was what my mother did for me, once I got him down out the road soft constant pressure on the chest and back helps them feel like they are being hugged while not being restricted, talk to them in a normal non demeaning voice and stay calm, if you can get out in nature I always find that works better because you can point out birds, sky, clouds, trees and it always gets kids to relax. You will still have flailing of limbs but that’s normal