my kid is 4 yrs old and he is biting his own teeth very harshly during sleep.why is he doing so ? what should I do to avoid that ?

A. there is no clear reason for it but stress is regarded as one of the main reasons for grinding of teeth in toddlers. try spending maximum time with the child. and also make sure nothing is disturbing the child at school or at home. do not firce the child fir anything