My kid has this habit of biting his nails. How can I correct this habit of his?

Hi, kids tend to bite their nails owing to various reasons, such as stress, anxiety, comfort or boredom. Sometime your child doesn't even know he's biting his nail -- it tends to be unconscious. So don't nag or punish him, rather, talk to your child to know why he has this habit. Try to discuss with him and eliminate the cause.