If your baby sweats a lot when he or she eats milk, it is mostly considered to be related to physiological factors, external factors, lack of vitamin D and calcium, etc. If necessary, you need to seek medical examination beforehand to clarify the causes and then deal with them. Common causes and treatment I. Physiological factors: 1. High metabolism: Babies are in a period of rapid growth and development, with a high metabolism, generating a lot of heat when sucking hard, resulting in sweating, but after stopping drinking milk, the sweating phenomenon stops. This is a normal phenomenon, parents need to wipe the sweat in time to avoid getting cold, and at the same time need to hydrate the baby, no special treatment is needed; 2. Environmental high temperature: baby wearing too much clothes or high room temperature, hot weather in summer, can also lead to a full head of sweat when breastfeeding. Parents can reduce the baby’s clothes and ventilate properly to relieve the problem. Pathological factors: 1. Lack of vitamin D and calcium: If there is a lack of vitamin D and calcium, the baby will not only have a full head of sweat when eating milk, but also have symptoms such as twitching during sleep and easy to be scared. If your baby has a deficiency of vitamin D and calcium, you should improve the trace element examination and follow the doctor’s instructions to supplement vitamin D and calcium. 2. Hyperthyroidism: This is a rare cause. If the baby sweats a lot when feeding, has poor weight gain, is inactive and has a heart murmur on auscultation, congenital heart disease can be considered, and a heart ultrasound should be completed and surgery can be performed if necessary.