I don't know how to really answer your question but I can give you an example of my sensory issues to hopefully give you an idea?
If I don't see someone and they touch me, it triggers this sort of.. Panic, I jump as if you shot a gun off behind me, my mind blanks for a second and I might appear to freeze. This happens anywhere on my body and is most intense when someone touches the top of my head. That's just my example for touch, I have many more but I'll keep those to myself, hope I helped you understand.