My DS will not stop biting his nails - he seems to permantley have them in his mouth, even when playing football or games... We have tried painting on 'Stop n' Grow' but this hasn't worked - infact he says he likes the taste! His nails are now so bitten down that they look sore and painful My mum thinks he does it because he may be anxious - but I think it's just become a habit... Does anyone have any advice on how I can help him stop ?