小儿在上感或其他传染病的初期,当体温在38℃以上时突然出现惊厥,在排除脑炎、脑膜炎等情况后,称高热惊厥,是儿科常见急症。据统计,约有2％～4％的5岁以下小儿曾患高热惊厥,男女之比为2:1。多于6个月～3岁之间发病,约占80％以上;6个月以下或6岁以上发病者少见。其原因是小儿脑发育未完善,神经元结构简单,皮层分化差,髓鞘生成缺乏, Children in the early flu or other infectious diseases, when the body temperature above 38 ℃ sudden convulsions, excluding encephalitis, meningitis and other conditions, said febrile seizures, pediatric common emergency. According to statistics, about 2% to 4% of children under 5 years old had febrile seizures, male to female ratio of 2: 1. More than 6 months to 3 years of age, accounting for more than 80%; less than 6 months or more than 6 years of age are rare. The reason is that children’s brain development is not perfect, simple neuronal structure, poor cortical differentiation, lack of myelination,