Sweating

Summer

My baby boy is almost 4 months old and he has always been a hot natured baby but he gets so sweaty even in the cool house his hands, feet, and armpits will get so sticky sweaty. If he is in the car in the carseat his back will be wet with sweat and his socks will be wet from sweat and I try to dress him as light as possible. Is this normal or should I contact his doctor?