I'm seriously concerned about my 5 year old and desperately need advice from others who may have been in a similar situation.
For some background, he has an official diagnosis of autism (diagnosed at 3) and we highly suspect he also has ADHD.
Anyway, for. the past few weeks we have been really struggling with his behaviour, particularly at night time. When we sit down at night as a family after tea time about an hour or so before bedtime, it's like something changes in him. He becomes extremely hyper active, giddy and lashes out at my other son who only 1. If one of us is holding the baby, he will come over and deliberately try to hurt him and make him cry. If we tell him no he just does it even more and laughs when DS2 cries. I'm worried that he has absolutely no empathy and gets joy out of hurting others.
I'm not sure if it's jealousy that is causing this, but we are honestly at wits end with this terrible behaviour and it's really putting a strain on our home life and our youngest is becoming terrified of his older brother.
Does anybody have any advice as to what we can do to stop him from being like this? We have tried things such as reducing screen time (suspect this is a big contributor to his hyperactivity), doing activities with him 1 on 1 etc.