Neonatal dehydration fever is mainly caused by the lack of water in the body of newborns and fever, the main reasons are: First, the lack of water. After birth, newborns lose a considerable amount of water through breathing, skin evaporation, excretion of urine and feces, and 3 to 4 days after birth, breast milk secretion is less, if not pay attention to supplementation will cause insufficient water in the body; second, the environment is too high temperature. Parents are afraid that the newborn baby is cold, wrapped too tightly, excessive warmth, so that its body temperature rises, breathing faster, the skin evaporates more water, can also be dehydrated. In the above cases, the newborn evaporates more water than sodium loss, the serum sodium increases, and the serum protein can also increase, which will lead to the occurrence of neonatal dehydration fever. Preventive measures for neonatal dehydration fever: 1. To prevent the occurrence of neonatal dehydration fever, in the first few days of life, such as insufficient breast milk should be supplemented with fluids, while avoiding excessive warmth and attention to environmental temperature. 2, in the high temperature season, to effectively arrange cooling measures, such as windows or balconies installed bamboo curtains to shade strong sunlight, pay attention to open windows and turn on the electric fan, etc.. 3, the fan to the ceiling or the ground to avoid gusts of wind blowing directly on the baby. If possible, ice can be placed indoors to cool the temperature. 4, newborn baby clothes to appropriate, summer does not have to use “candle bag”; diligent bathing, diligent feeding water, to prevent the occurrence of dehydration fever.