Nail and finger biting

[Lightseverywhere]

My 4 year old has been biting her nails for about 6 months, have tried bitter nail polish but doesn't work...she has now progressed to chewing her fingers, taking the skin off the top of her fingers and making them bleed. I know she is really worried about starting school in September, and this is probably what is causing this. But hoping for some advice on how to stop her from doing it?

Have you tried giving her something to chew instead, maybe like a raw carrot or some Chewellery?

My 8yo does this, nothing I've tried works. In the end I think she'll stop when she actually wants to herself. Or maybe never. I can't control it.

Thanks both! I've given her a fidget toy but that hasn't seemed to help! Was hoping I could bribe her out of it but sounds like I might be in it for the long haul!