DS1 bites his bottom lip while he sleeps and at other times throughout the day while he's lounging or riding in the carseat.

We've been talking to him about it and telling him to stop if we see him do it, but not sure what the right approach is for this. I think it's a coping/comfort mechanism that's tied to his attachment to his lovey too.

His lips /chin doesn't get overly chapped or anything but I always wonder how it will affect his teeth, etc. and plan on asking our dentist at his first check up in the coming months.

Does your lo bit their lip? If so, do you do anything about it?