Hey Ankita.. This habit of children or even elders is subconscious one. One might not even know that they are doing that. In children, nail biting may be one of there stress busters. U can try few tip

Hi Ankita! Please notice is ur child copying somebody at home/school. Or this cud be response to some tension going on in child's mind. Please talk it out to ur child n discourage him by telling the