Autism meltdown :(

Raylin

Hey everyone, I have a three year old who is starting to really throw fits lately. he screams and will use his chin ( he taps things to his chin on a daily and applies pressure to it a lot with his hand ) to push down on your hand or whatever he can grab … it’s barely hurts but it does hurt sometimes so it’s concerning , I’ve been struggling really bad to calm him any methods you all use or tips? I really don’t like seeing him struggle to calm himself down and honestly don’t know what to do anymore