出血原因:①结扎线感染。②操作失当。长期以来,认为原发性内痔好发部位与痔上动脉的分支类型有关。近20年来,认为痔上动脉分支类型个体差异很大,与上述传统概念不尽相同,二者无直接联系。与肛门粘膜下血管分布的密度无关。因此原发内痔的好发部位是否与痔上动脉有关,痔上动脉 Causes of bleeding: ① ligature infection. ② improper operation. For a long time, that the primary hemorrhoids prone position and the hemorrhoid artery branch type. In the past 20 years, the hemorrhoidal artery branch type is considered to be very different from the traditional concepts mentioned above, and there is no direct relationship between the two. It has nothing to do with the density of anal submucosal blood vessels. Therefore, the primary site of hemorrhoids and hemorrhoids whether the site of the hemorrhoid artery, hemorrhoid artery