Infants who sweat a lot at the back of the head while sleeping can be due to environmental factors, physiological causes, or pathological causes due to calcium and vitamin D deficiency. Parents should pay attention to the frequency and severity of sweating in infants, and if necessary, take the infant to the hospital for examination to determine the cause of sweating and timely treatment. Common causes and solutions 1, high metabolism: infants have a high metabolism and immature central nervous system thermoregulation ability, so they tend to sweat a lot when they sleep; 2, environmental factors: if parents cover their infants with too thick blankets, infants wear too much or the room temperature is too high, they will also have the phenomenon of sweating at the back of the head; 3, calcium and vitamin D deficiency: infants with calcium and vitamin D deficiency cause rickets When the calcium and vitamin D deficiency causes rickets, the blood calcium level in the body decreases and the excitability of the nerves increases, which also causes the phenomenon of excessive sweating in sleep, accompanied by symptoms such as shallow sleep, easy to wake up, and abnormal sternal development. Parents need to give their infants vitamin D3 supplements under the guidance of a doctor and take them outdoors in the sun more often to promote calcium absorption. Parents should pay attention to the fact that when babies sweat a lot, they should always dry them with clean cotton towels to keep their skin dry and avoid getting cold due to the wind; they should not wear too thick or cover them with too thick blankets when they sleep; babies who sweat a lot lose water easily, so parents should feed them more warm water or rice soup to replenish water in time to avoid dehydration.