The infant’s nervous system is not well developed and has some deficiencies in its own thermoregulation. Parents should take care to ensure that the environment is the right temperature when the infant is sleeping to avoid catching a cold, but also to avoid wearing too much clothing or too thick a blanket. If you are sure that the environment is fine and the infant continues to sweat after falling asleep for a long time without relief, you should also be alert to the possibility of a calcium deficiency. As babies with calcium deficiency are more likely to have restless sleep, wake up easily and sweat a lot, attention should be paid to adjusting the diet, adding supplements appropriately and, if necessary, treating with calcium supplements.