Hey, I'm not sure if I'm able to post this here, but I'm not sure where else I can post this.

So I'm posting on behalf of my brother who is living with us in a family of 5, and around February 2021 he stopped talking completely to all 5 of us, and even people from outside, we get no emotional or physical reaction.

He stays on his phone in bed all day, and eats once every two days and even that is takeaway, he won't eat home-cooked food.

We've seen him develop some further symptoms like extreme OCD where everything has to be in a perfect position and he'll use wash sponges once then throw them away.

His hygiene is perfectly fine, he's almost too clean, other than his hair which has been growing since he stopped talking but he trims his beard very often, again almost too often.

I was wondering if anyone on this subreddit may have an experience of this and can advise something that helped them come out of this. I believe its some sort of depression mixed in with undiagnosed autism