My son is 4 year old. I have observed it many times that he is having different body tempreture in the different parts of body. some times his face forehead,palm and foot and the parts which is under the clothes become very hot and the rest of the body parts like legs and arms and parts which is not covered under clothes is having the normal tempreture. But in this condition comes most of the time when he is sleeping and very rare in the morning or day time. I am very confused why this is happening to him. what is the reason for the same. does it a fever because after sometime or few hrs he become fine. please advise.