晕厥是由各种因素诱发的一种暂时性血循环障碍，造成脑缺血，并发极短暂的意识不清［１］。笔者近１０年来，在诊治牙病过程中发生晕厥３０例，现对引起晕厥的原因进行分析，对预防和处置进行探讨。１临床资料１．１一般情况本组男１０例，女２０例；年龄１７～６３岁。晕厥发 Syncope is a temporary disorder of blood circulation induced by various factors, resulting in cerebral ischemia, very short-lived unconsciousness [1]. The author in the past 10 years, in the process of diagnosis and treatment of dental disease occurred in 30 cases of syncope, are the causes of syncope caused by the analysis of prevention and treatment to be explored. 1 Clinical data 1.1 General This group of 10 males and 20 females; aged 17 to 63 years old. Syncope hair