I've only ever found two real studies on topic of tactile processing issues. reading the descriptions of tactile defensiveness made me feel less crazy.
The neurological process of light touch and movement being miss communicated to include a fight or flight response. The stress to muscles and joints that goes with constantly supressing a low level fight or flight response.
I've found it helpful when explaining to people hoe it is for me at least. To ask them to describe their physical response to something like a jump scare, someone startles you from behind kinda thing. then i ask if lightly moving their own hand over their arm causes the same feeling at like 1/3 the intensisty. Sure they usually say something along "thats not real". But damnit i was at least able to explain the experiance.
these links shouldnt have paywalls. i can poke around for new links if they do.