My 4.6 year son keep moving his neck up and down , shrug his shoulders and arms repeatedly from last 2 days. What and why he is behaving like this?

A. Then you should ask your child why are you doing it because your child can only make you understand if there is a discomfort or issue or child is facing because why your child is behaving like this that cannot be predicted without talking to the child or a physical assessment if you’re unable to figure it out then please check with your doctor personally