从广义上讲,1个月～5岁的小儿非中枢神经系统感染引起的体温升高(一般认为超过39℃)时出现的惊厥,称高热惊厥。高热惊厥是小儿常见急症之一。5岁以下发病率为2％～3％。多发生在6个月～3岁的小儿。引起高热惊厥的病因多而复杂,这个时期的小儿脑发育不成熟,脑的兴奋和抑制处于不稳定状态,高热可使中枢神经系统处于过度兴奋状态,使脑对外界刺激的敏感性增加,兴奋易于扩散,故临床上易出现惊厥。 Broadly speaking, convulsions occur in children with non-CNS infections of 1 month to 5 years of age (generally considered to be above 39 ° C) and are referred to as febrile seizures. Fever convulsions is one of the common emergency in children. The incidence of 5 years of age is 2% to 3%. Occur in 6 months to 3 years old children. The causes of febrile seizures are complex and complicated. During this period, children’s brains develop immaturely. The excitement and inhibition of the brain are in an unstable state. The hyperthermia can cause the central nervous system to be over excited and make the brain more sensitive to external stimuli. Easy to spread, so prone to convulsions in clinical.