If your child touches a hot portable heater, you should first determine the extent of their injury. If they have any burns, immediately cool the burn with cool water for 10-15 minutes. After cooling the burn, cover it with sterile gauze or a bandage. Seek medical attention if the burn is more than three inches in diameter, if it is on the child's face, hands, feet, groin, buttocks or a major joint, or if it seems infected.If your child has not been burned, try to get them to stop touching the hot surface and wait until it cools down. Warn them about how dangerous it is to touch something that is too hot.