The main clinical symptoms were:the difficult defecation ,elongation of defecation anus distentin and non - complet defecation . dejecta turns small, &hemorrhoids.

• 主要临床症状:均有排便困难,排便时间明显延长,伴有肛门坠胀,有排便不尽感,粪便条变细,合并痔疮。