Hi..
Welcome to HCM..
As per your complain it seems that your son has a teeth grinding habit also known as
Bruxism and it can be due to causes like
teething,
anxiety,hyperactive kids etc..
It can cause considerable wearing off of the teeth leading to making them sensitive and at times there can be
nerve exposures and pain..
There can also be disturbances in the functioning of the jaw joint leading to pain and discomfort..
I would therefore suggest you to consult a Pedodontist and get him evaluated and a certain questions has to be asked to a child like:
1. How does he feel before going to bed?
2. Does he have any problems in school or with friends or anyone at home?
3. Do you find your child to be struggling with something?
4. DO you see any abnormal behaviour of your child when anything particular happens?
Although children when grows, the problem commonly subsides/
As of now make him relaxed while sleeping, talk to him..
Try sleeping with your kid to make him feel relaxed and supported..
Give him nutritious diet and give him sufficient rest..
In case if his teeth are wearing mouthguards can be advised by
dentist..
Hope this helps..
Regards,