Dc biting nails constantly

[Hullabalooo]

My DC has started biting his nails constantly since i left EA ex last year. He didn't do it at all before. It's almost obsessive and he can't stop although I've tried rewards, discussing it with him, talking about the situation etc.

It's much worse when returning to mine from ex and he's usually emotionally quite fragile then. His dad says inappropriate stuff to him about me and continues his abuse in that way and it's upsetting him.

Any suggestions of what to do to try to address this biting?

It’s really hard.

My dis started biting when his baby brother was born - that was 2.5 years ago and we haven’t managed to get it under control. Now it’s almost the school holidays we are trying funky blue nail varnish as a fun thing to discourage the biting starting with toes. If he bites them with the varnish on then it all comes off. Once school breaks up I am going to do his fingers as well. They are so bitten down it pains me to look at them. But I found we needed to wait until he was emotionally ready. He’s keen to sort it out rather than panicked and upset so fingers crossed it works.

Thanks for responding. Sorry it's been so long ongoing. Did you try the nail varnish anti bite stuff.. thinking of trying that next. Not sure what to do. Can't talk to ex about it for obvious reasons.

He's started holding his willy all the time now too