扁平苔癣是一种常见的、慢性表浅性粘膜皮肤疾病,目前尚无特效疗法。本文作者采用CO_2治疗机用接触法、京制Ⅱ型液氮冷冻机用喷雾法一共治疗扁平苔癣40例,其中年龄最小15岁、最大60岁,结果痊愈20例(50％)、好转19例(47.35％)、无效1例(2.5％),总有效率为98％,随访3个月～ Lichen planus is a common, chronic superficial mucocutaneous disease that currently has no effective treatment. In this paper, the CO 2 treatment machine contact method, the Beijing Ⅱ type liquid nitrogen freezer spray method for the treatment of lichen planus 40 cases, of which the youngest 15 years old, maximum 60 years old, the results were cured in 20 cases (50%), improved 19 Cases (47.35%), 1 case (2.5%), the total effective rate was 98%, followed up for 3 months ~