81% of the DPS pa-tients had internal rectal or anal prolapse. The key to the treatment is the breaking of the vicious cycle caused by straining defecation and anal internal prolapse in DSP patients.

• 的DPS伴直肠或肛管内脱垂；积极处理内脱垂；避免用力排便；打断其与DPS间恶性循环；是DPS防治的关键；治疗有效率为80.；8%25。