Have a spell of n v while straining at stool 里急后重时发生恶心和呕吐
2.
Bacterial or viral infection of the intestine may result in explosive watery diarrhea , tenesmus ( spasmodic contraction of anal sphincter with pain and persistent desire to defecate ) , and abdominal cramping pain 肠道被细菌或病毒感染，引起暴发性水泻、里急后重（肛门括约肌痉挛性收缩伴疼痛，一直想要排便）及腹部绞痛。
3.
Rectum prolapse ( prolapse of the anus ) anus of aching be confined to is local , companion has ulcer , nightly and quiet when more painful , although pathological changes develops and aggravate , can appear meaning is frequent , in urgent hind heavy , defecate incontinent , excrement and urine is fine narrow contain the symptom such as purulent blood secretion 直肠脱垂(脱肛)疼痛限于肛门局部，伴有溃疡，夜间安静时更痛，虽病变发展而加剧，可出现便意频繁、里急后重、大便失禁、粪便细窄并带有脓血分泌物等症状。
4.
Common symptom is redness of skin bright red , hematic capacity is not much , mix have mucus , blood is in more surface of excrement and urine , if haemorrhage amount is large , or haemorrhage with the passing of time , can cause angular , anemia , when polyp is bigger , also can appear in urgent hind heavy , constipation , anus pours out of the symptom such as more secretion 常见症状为血色鲜红，血量不多，混有黏液，血多在粪便表面，若出血量大，或出血日久，可引起消瘦、贫血，息肉较大时，也可出现里急后重、便秘、肛门流出较多分泌物等症状。
