Methods:100 patients divided randomly into two groups,of 50 cases. Treating group applied externally by WBLXS and contrasting group by vaseline gauze only.

• 方法：将100例肛瘘术后创口患者，随机分为实验组与对照组，每组各50例，实验组用凡士林纱条包裹王不留行散粉剂填塞创口；