Babies sweat a lot when they are breastfeeding, mostly because of physiological sweating. Physiological sweating is due to the baby’s vigorous growth and development, fast body metabolism, large water content of the skin, more microvascular distribution, immature development of the plant nerves, and the child exerts a lot of force when eating milk, so naturally there will be sweating. At this time, see if the baby is wearing a lot of clothes, has just cried or has nervous or fearful emotions, if there are these factors, we should exclude them. If the baby is just a little sweaty when eating milk, there is no need to make a fuss, this is a normal phenomenon; pathological reasons may be vitamin D supplementation caused by low blood calcium; in addition, there is a genetic tendency, parents usually sweat, the baby also loves to sweat.