In the cold winter because parents are afraid of their children to freeze, often to the baby, especially newborns and small infants wrapped too tightly, or in sleep was covered head, and the resulting muffled fever syndrome is also called muffled syndrome, masked syndrome, the child to the hospital often see sweating, high fever, underwear wet, pale, heavy convulsions, coma, respiratory weakness, circulatory failure, and even the loss of young life, it is very sad. As children are small their own thermoregulatory center function is not perfect, in the subject of wrapped tightly, the head is covered can lead to brain hypoxia injury, high fever, dehydration, convulsions, coma. Some children are rescued, but they may be left with different degrees of sequelae. Remind parents to always expose the child’s head and face when taking the child out or sleeping! Can not give the baby wear too thick! Avoid tragedy!