I work with 5 autistic boys ... at this moment ,most of the time alone we don't have staff. Four are practically non verbal. Using a timetable where they can consult and anticipate what there is to do helped reduce some challenging behaviour, telling them, because not being able to talk does not necessarily mean a person does not understand, and showing pictures about what will happen next sometimes help. Negotiating they can have something they wish after doing a certain thing I want...
Yet most of the challenging behaviour I must admit is my fault. I gave in... I did not find a correct way for them to express themselves in another way and challenging behaviour got them what they wanted: my attention and what they wished... It's hard not giving in, yet you learn to live with frustration when you have to deal with a " no" and having another choice available. Have a nice day.

Every day @A MyAutismTeam Member, because like your Son, Mine also expresses Himself without words.
-Hitting His head (when He's in Pain/Tired)
-Biting His hand (usually when He's Hungry)
-Hitting His belly (Either Hungry or has Stomach Ache)
-Over-Stimming (Sensory Overload)
Nothing to get Mad about, just try a few things.
@A MyAutismTeam Member, are you willing to share what you have accomplished?

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A MyAutis...

A MyAutis...

I don’t suppose he could have something that simulates riding on a bus? He might like the motion. Or a treadmill?

So just noticing mostly nonverbal seem to be having difficulty with their emotions or expressing

My 13 year old son is non verbal. He is starting to communicate verbally. We had a communication device for him. That helped him see the words and then learned what the words meant. The communication device you have to have a speech therapist write a letter to your insurance of why they need it and how it would benefit your son. There are steps that you have to take to get the therapist to do that letter. My son acted up before we got the device.