@laurie4321 It's not developmentally typical for a 3yo to be frequently violent to such an extent. If people have told you that it is they might be trying to make you feel better or being nice. I do not find it a helpful approach, it's pretty gaslighty when you're dealing with an extreme parenting situation for everyone to be like "Don't worry, it's normal, he'll grow out of it!"
This is extreme. You're dealing with a hard thing. It's OK to find it hard. Please ask for help.
ADHD, reactive mum of ADHD kid and second probably ND but no diagnosis yet kid here.
Yes, seek professional advice, but also, some actual tips you can use now.
REDIRECTION. Always always always redirect any violent urges onto non humans. It doesn't matter what it is, just cast around randomly for the closest safe item. "No biting me. You can bite this t-shirt/book/toy". Hilarious but proud moment when my eldest, then four, screamed at me "I AM SO ANGRY I WILL BITE THE STAIRS!!!" When they start doing the redirection
themselves it's a turning point.
UNDERSTAND THE HUMAN NERVOUS SYSTEM. This is too long to explain here but essentially we all have a system wired for protection that gets fired up when we detect threat, and it's basically old old software that runs purely on instinct. When children have got into this state they have an activated nervous system and they are reacting to YOU as though you are the threat, which is why they are violent. Because they are in fight or flight, they cannot easily access the brain centres for language processing, logic, reasoning, empathy etc.
Good google search terms: Dysregulation, fight or flight, sensory processing, sympathetic nervous system.
Good resources: Mona Delahooke, @TheOTButterfly, Stuart Shanker's Self-Reg, Zones of Regulation, Conscious Discipline. Each one has various formats - podcast interviews, videos/webinars, books, social media pages.
CUE SAFETY. When a child gets riled up like this it activates our SNS too - so we start reacting as though they are a threat, this is where the urge to hit comes from. Take a minute to notice your body language next time this happens. I expect that you get loud and you get big and you start to move faster, and your voice gets higher pitched. These all happen because it feels like an emergency and/or because parenting experts tell us that we need to be in control of our kid, and being a bigger, scarier threat feels like a way to do that. But if he is totally gone into FOF then he's not even in control of himself. So in order to communicate to his body and his nervous system that you are not a threat, do the opposite. Crouch down, move slowly. Imagine that he is a wild animal that you don't want to spook, if you like. Get low, get close. Make your voice soft and low. If he likes physical touch and/or eye contact, then do those things. If those would freak him out more, don't do them. When you're in front of him, take some really slow obvious deep breaths. Don't tell him to breathe, just let his mirror neurons kick in and copy you.
You might want to look at the Calm The Chaos "Family Road Map" - I really like this because it starts with figuring out where you are right now.
It's no use being told "Behaviour is communication!" endlessly when you already know that but don't know what to do with it. Or having so many different techniques thrown at you when you're actually just struggling to keep everyone safe, and nowhere near being able to use advanced techniques. Or you've done the basics and now you're ready to move on but can't find further info. Anyway I think the idea of a road map is totally genius. The first chapter of the book, which you can download here, explains this well:
https://calmthechaosbook.com/?fbclid=IwAR17e_shOzWgDnYkTnPhlgWcfrh1tC88tmB9CtQvhgX1sHEuLgWn8dBowD8