Im the father of twins that are almost 6.
We have been dealing with this same behavior for a few years.
In the last few months it has began to escalate into more and more violent rages...
Same as a lot of you are saying, once in the "fit" (which lets not even us that word, it is a full blown rage) they are hyper-angry and completely unreachable.
Usually the behavior will stem from not getting what they want, Or being told to put away a toy or game or something...
THey have began to hit and scratch us to the point that we look like battered spouses. And that is hard on the ego as I am a big guy...
My wife and I are feeling at a loss.
Our kids are NICU babies born 2 months early at 4 lbs each...
Our life has consisted of "managing their outbursts and fits".
THey can happen any time (at home 99% of the time).
at least 4 days a week, I'll wake up to them punching and kicking each other over the top of me.
Then the hitting, scratching, pinching, kicking of me begins...
They have been on a gluten free diet for a couple of years.
It has made only the smallest of dents in things.
Feels helpless when we are in it...