Don't be afraid. Teeth grinding is a normal condition in this age as he is about to get his payment teeth. Permanent teeth stars erupting in 6-7 years of age
Teeth grinding in this age is not unusual. Most common reason for teeth grinding in children is worm infestation. Before consulting a dentist pl take him to pediatrician for DEWORMING schedule. If d problem is still persisting then consult ur dentist.
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