Tight pressure makes my sensory issues go less.
My therapist is using it now at me manually and after 15 to 30 minutes I get more relaxed, because my heart rate is going down and breathing becomes easier and I can concentrate better on what she is saying.
Also it makes my stimming get less, as I usually stim the whole session.
Tight pressure or tight hugs make me feel, that my body has physical boundaries and I feel like being "more kept together" like after a while it helps me to feel distincted from everything around me better, at least for a while.
With all the incoming stimuli from environment it is hard for me to feel that I have physical boundaries which separates me from the environmental stimuli and I literally get lost in it, which can eventually make me to bump into people on the street.
I only tolerate being touched by someone I trust completely and when I get told being touched before, otherwise it makes things even worse.
_________________
English is not my native language, so I will very likely do mistakes in writing or understanding. My edits are due to corrections of mistakes, which I sometimes recognize just after submitting a text.