Yes, non-verbal people are most at risk. Very worrying. It create anxiety amongst parents because we never know if they are having physical problems unless it is obvious.

It is different among each individual, just like Autism.
Everyone experiences it differently and needs specific treatment for their unique situation.
There are different Triggers that set it off.
I know personally a family that deals with it daily.

I don't think many people do. The difference between us is sometimes great my dd is variable.

Yes thanks he is fine as on safe medicine and looked after by very specialist people. The case was on Healthunlocked on person with learning disability and neglected because she had mental health problems.

you described my life!!! My daughter was diagnosed 3 years ago with severe autism non-verbal and unable to walk. Every day I blame myself thinking did I cause this? That’s where my mental health comes into play! Beating myself up is where anxiety comes in along with depression. They do say that depression loss of interest in activities we once enjoyed. I haven’t coped so maybe that’s why I feel like this every day idk I do try every day to make it better for my mentally.