Hangzhou medical bo anus tai hospital medical external hemorrhoids. Now on the causes of hemorrhoids is not entirely clear, it is generally believed mainly related to the following factors:
杭州医博肛泰医院医外痔疮.现在对痔的病因并不是清楚，一般认为主要与下列要素有关：
⑴与人体的直立情况有关：由于肛门直肠位于躯干下部，杭州医博肛泰医院医外痔疮人又常处于直立情况，肛门相对于心脏方位较低，由于重力的要素，肛门直肠部位的血液回流到心脏比较困难，简略郁结成痔。
⑵与感染要素有关。切片检查常常可在痔安排中见到炎症改变，杭州医博肛泰医院医外痔疮所以有学者认为痔静脉丛的感染和血栓构成是构成痔的原因。因血管内膜的炎症和静脉周围炎使痔静脉丛的血管壁脆化，变薄，曲张，究竟构成痔。
⑶与痔静脉无瓣膜有关。人体其他部位的静脉都有许多瓣膜，杭州医博肛泰医院医外痔疮就像是血管中的阀门开关让血液只能朝一个方向活动，不能回流。但是，肛门部位的痔静脉中没有瓣膜，血液简略滞留在部分，导致部分血管曲张，逐渐构成痔。
⑷与便秘和排便时间过长有关。当干硬的粪块进入直肠壶腹部时，杭州医博肛泰医院医外痔疮对直肠壁和肛管上部施加必定的压力。而处于硬便和直肠、长管肛层之间的痔上动静脉遭到粪便的揉捏，静脉压力低，且没有弹性，因而血液回流简略受阻。但是，动脉压力又高，又有弹性，不易遭到揉捏，血液仍可持续进入肛门直肠。而静脉回流受阻，进入的血液就会积聚于肛门直肠的静脉丛中，导致静脉丛扩张迂曲，杭州医博肛泰医院医外痔疮一朝一夕逐渐构成以小动脉为中心的静脉曲张性团块，究竟增大构成痔。
⑸与肺气肿、缓慢支气管炎等腹压增高的疾病有关。杭州医博肛泰医院医外痔疮腹压过高会影响肛门直肠部位的血液回流，加重痔静脉的曲张。其他，肝硬化、门静脉血栓炎等可引起门静脉内压亢进，直接导致痔静脉丛压力上升，这也是痔构成和加重的要素之一。
⑹与饮食有关。饮食中纤维素过少会导致便秘，喝酒杭州医博肛泰医院医外痔疮、吃辛辣影响性食物也会影响肛门直肠充血和部分血液循环阻碍，一朝一夕则会构成痔。
(1) associated with the body upright situation: due to the anus rectum is located in the lower part of the trunk, and often in an upright, anus, low relative to the heart position, due to the gravity, the elements of the anus rectum the blood flowing to the heart is hard and short ease into hemorrhoids.
2 and the related factors of infection. A biopsy is often seen in inflammatory change is arranged in the main, so some scholars think hemorrhoid venous plexus of infection and blood clots form constitute the main reason. Due to inflammation of the vascular intima and vein inflammation around the hemorrhoid venous plexus of hemal wall embrittlement, thinning, varicose, what constitutes a hemorrhoid.
(3) associated with hemorrhoids without valve. Of vein in other parts of the human body has many valves, like a valve switch allows blood in vessels in one direction only, cannot return. Hemorrhoids and anal region, however, there are no valves in vein, blood briefly stranded in the part, cause varices, gradually form hemorrhoid.
(4) associated with constipation and defecate time is too long. When moist poop into the rectum pot belly, tubing to the intestinal wall and the upper bound to pressure. In hard, long tube anus and rectum layer between the hemorrhoid arteriovenous by dung on kneading, venous pressure is low, and there is no elastic, so short of regurgitation (backflow of blood. But, the arterial pressure is high, and elastic, not by kneading, blood still sustainable into the anus rectum. And venous return, enter the blood will accumulate in the anus rectum vein clump, lead to venous plexus expansion circuity, gradually form small artery centered overnight varices sex mass, whether to increase a hemorrhoid.
5] and slow emphysema, bronchitis, increased abdominal pressure disease. Abdominal pressure too high will affect the anus rectum blood backflow, aggravating hemorrhoid venous varicose. Other, liver cirrhosis, portal vein thrombosis inflammation can cause within the portal vein pressure disease, such as a direct result of hemorrhoid venous plexus pressure rise, this is the main form and one of the main factors to increase.
[6] is related to diet. Dietary fiber too little can lead to constipation, drinking, eating spicy foods could also affect the anus rectum hyperemia and partial blood circulation, will constitute a hemorrhoid overnight.
