After local anal surgery, some patients have anal stenosis when defecating, and poor control of loose stools. The reasons for this are as follows: 1. local scar contracture after surgery, poor elasticity can not open well, and because the scar tissue is not soft enough, resulting in poor closure function. Cheng Fang, Department of Anorectal Medicine, Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine 2. Some surgeries are treated by thermal burns, which actually means that electrodes are inserted into the hemorrhoid nucleus, electrified, locally cauterized, and the hemorrhoid nucleus shrinks, and often the surface of the hemorrhoid nucleus is uneven after surgery and cannot be restored to a soft and smooth physiological structure. Patients have long-term anal discomfort, along with anal stenosis and incomplete closure. 3. Some patients after PPH form a localized annular stenosis, which also affects the anal function and forms anal stenosis with incomplete closure. For this situation, I have concluded the following two treatment countermeasures based on many years of clinical experience: 1. Conservative treatment plan includes stepwise anal dilatation method. 2. Minimally invasive surgical program includes original hanging dilation.