脱肛者，肛门脱出也，多因久痢后大肠虚冷所为。肛门为大肠之候，大肠虚而伤于寒，
痢而用气KT ，其气下冲，则肛门脱出，因谓脱肛也。
夫风冷在内，入于肠胃则成大下。下断之后，脾胃虚，气逆，遇冷折之，其气不通，则
令哕也。
谷道虫者，由胃弱肠虚而蛲虫下乘之也。谷道、肛门，大肠之候。蛲虫者，九虫之内一
虫也，在于肠间。若腑脏气实，则虫不妄动，胃弱肠虚，则蛲虫乘之。轻者或痒，或虫从谷
道中溢出，重者侵食肛门疮烂。
谷道痒者，由胃弱肠虚，则蛲虫下侵谷道。重者食于肛门，轻者但痒也。蛲虫状极细微
，形如今之蜗虫状也。
肛门为大肠之候，其气虚，为风热所乘，热气击搏，故令谷道赤痛也。
湿 病，由脾胃虚弱，为水湿所乘，腹内虫动，侵食成 也。多因下利不止，
或时病后，客热结腹内所为。其状，不能饮食，忽忽喜睡，绵绵微热，骨节沉重，齿无色，
舌上尽白，细疮如粟。若上唇生疮，是虫食五脏，则心烦懊；若下唇生疮，是虫食下部，则
肛门烂开；甚者腑脏皆被食，齿下上龈悉生疮，齿色紫黑，利血而湿，由水气也。
脾与胃合，俱象土，胃为水谷之海，脾气磨而消之，水谷之精，化为血气，以养腑脏。
若脾胃和，则土气强盛，水湿不能侵之。脾胃虚弱，则土气衰微，或受于冷，乍伤于热，使
水谷不消化，糟粕不傧实，则成下利，翻为水湿所伤。若时病之后，肠胃虚热，皆令三尸九
虫，因虚动作，侵食五脏，上出唇口，下至肛门。胃虚气逆，则变呕哕。虫食腑脏伤败，利
出瘀血，如此者死。其因脾胃虚微，土气衰弱，为水湿所侵，虫动成 ，故名湿
也。
又云∶有天行之湿，初得不觉，行坐不发，恒少气力，或微利，或不利，病成则变呕吐
，即是虫内食于脏。
又云∶有急结湿，先因腹痛下利，脓血相兼出，病成翻大小便不通，头项满痛，小腹急
满，起坐不安，亦是内食五脏。凡如此者，虽初证未发于外，而心腹亦常烦懊，至于临困，
口及肛门方复生疮，即死也。
脱肛，是指肛门向外脱出，多因长期腹泻（痢疾）后大肠虚寒所致。肛门是大肠功能的外候，大肠虚弱且受寒邪侵袭，在腹泻时用力努挣，导致气机向下冲逆，从而使肛门脱出，因此称为脱肛。
若风冷之邪在内，侵入肠胃则会导致严重腹泻。腹泻停止后，脾胃虚弱，气机上逆，再遇寒冷折损，致使气机不通，从而引发呃逆（哕）。
谷道、肛门，是大肠功能的外候。若大肠虚而有热，热气结聚于肛门，因而导致生疮。
谷道生虫（湿病），是由于胃弱肠虚，蛲虫下行侵扰所致。谷道、肛门是大肠的外候。蛲虫是九种寄生虫中的一种，栖息于肠间。如果脏腑之气充实，则虫不会妄动；若胃弱肠虚，蛲虫便会乘虚而入。轻者可能感到瘙痒，或有虫从谷道溢出；重者则会侵蚀肛门，导致溃烂。
谷道瘙痒，是由于胃弱肠虚，蛲虫下行侵扰谷道所致。重者会啃食肛门，轻者仅表现为瘙痒。蛲虫的形状极其细微，形态如同现在的蜗虫。
肛门是大肠功能的外候，此处气虚，被风热之邪所乘，热气搏击，因此导致谷道发红疼痛。
湿病（指由寄生虫引起的慢性消耗性疾病，又称“尸注”或“蛊毒”类病症），是由于脾胃虚弱，被水湿之邪所乘，腹内虫体蠕动，侵蚀人体而成。多因长期腹泻不止，或时令病后，客热结聚于腹内所致。其症状表现为不能饮食，精神恍惚喜睡，持续微热，骨节沉重，牙齿色泽暗淡无光，舌面全白，皮肤出现如粟米般细小的疮疹。若上唇生疮，说明虫已侵蚀五脏，患者会感到心烦意乱；若下唇生疮，说明虫侵蚀下部，则肛门溃烂张开；严重者脏腑皆被虫蚀，上下牙龈均生疮，牙齿呈紫黑色，腹泻带血且伴有湿气，这是由水气所致。脾与胃相表里，都象征土性，胃为水谷之海，脾气负责研磨消化，水谷的精微物质转化为气血，以滋养脏腑。若脾胃调和，则土气强盛，水湿不能侵犯。若脾胃虚弱，则土气衰微，或受冷邪，或暂受热邪，导致水谷不消化，糟粕不实，从而形成腹泻，反被水湿所伤。若在时令病之后，肠胃虚热，都会导致三尸九虫因虚而动，侵蚀五脏，向上出于唇口，向下至肛门。胃虚气逆，则变为呕吐呃逆。虫蚀脏腑导致败坏，泻出瘀血，这种情况预后不良，多致死。其病因在于脾胃微弱，土气衰弱，被水湿侵扰，虫动成病，所以称为湿病。
又说：有一种天行湿病，初起时不觉察，行走坐卧均无不适，但常感气力不足，或轻微腹泻，或不腹泻，病成后则变为呕吐，这就是虫在体内侵蚀脏腑的表现。
又说：有一种急结湿病，先因腹痛腹泻，脓血混杂而出，病成后反而大小便不通，头项胀满疼痛，小腹急迫胀满，起坐不安，这也是虫在体内侵蚀五脏的表现。凡是此类情况，虽然初期症状未显于外，但心腹常烦闷懊恼，直到临终前，口腔及肛门才生出疮疡，随即死亡。
Tuogang (Rectal Prolapse) refers to the prolapse of the anus, mostly caused by deficiency-cold of the Large Intestine following chronic dysentery. The anus is the external manifestation of the Large Intestine; when the Large Intestine is deficient and injured by cold, and during dysentery, effort is exerted causing Qi to rush downward, the anus protrudes, hence it is called Tuogang.
If wind-cold resides internally and enters the intestines and stomach, it leads to severe diarrhea. After the diarrhea stops, the Spleen and Stomach become deficient, Qi rebels upward, and upon encountering cold which obstructs it, Qi flow becomes blocked, resulting in hiccups (Yue).
The Gu Dao (anal opening) and anus are external manifestations of the Large Intestine. If the Large Intestine is deficient with heat, heat Qi knots at the anus, thus causing sores.
Worms in the Gu Dao (often referring to a parasitic disease known as Shi or "Dampness" in this context, specifically involving Ascaris lumbricoides or similar parasites like Enterobius vermicularis) occur due to weak Stomach and deficient intestines, allowing pinworms (Nao Chong) to descend and invade. The Gu Dao and anus are external manifestations of the Large Intestine. Pinworms are one of the nine types of intestinal worms, residing in the intestines. If the viscera Qi is solid, worms do not move recklessly; if the Stomach is weak and intestines deficient, pinworms take advantage. In mild cases, there may be itching or worms overflowing from the anal opening; in severe cases, they invade and eat into the anus, causing ulceration.
Itching of the Gu Dao is caused by weak Stomach and deficient intestines, allowing pinworms to descend and invade the Gu Dao. Severe cases involve eating the anus, while mild cases only present with itching. Pinworms are extremely minute in shape, resembling modern "snail worms" (likely referring to threadworms/pinworms).
The anus is the external manifestation of the Large Intestine. When Qi here is deficient, it is invaded by wind-heat; heat Qi attacks and combats, thus causing the Gu Dao to become red and painful.
Shi (Dampness/Parasitic Disease), here referring to a specific parasitic condition often translated as "Corpse Transmission" or "Gu Poison," is caused by weak Spleen and Stomach being invaded by water-dampness, with internal worms moving and consuming the body. It often results from persistent diarrhea or residual pathogenic heat after an epidemic illness knotting in the abdomen. Symptoms include inability to eat, mental fog and drowsiness, continuous low-grade fever, heaviness in bone joints, colorless teeth, a white-coated tongue, and small sores like millet grains on the skin. If sores appear on the upper lip, it indicates worms have eaten the five Zang organs, causing mental restlessness (Ao); if sores appear on the lower lip, it indicates worms have eaten the lower part, causing the anus to rot and open. In severe cases, all viscera are consumed, sores appear on both upper and lower gums, teeth turn purple-black, and bloody diarrhea with dampness occurs due to water Qi. The Spleen and Stomach are exterior-interior related, both symbolizing Earth; the Stomach is the sea of water and grain, and the Spleen grinds and digests it. The essence of water and grain transforms into Blood and Qi to nourish the viscera. If Spleen and Stomach are harmonious, Earth Qi is strong, and water-dampness cannot invade. If Spleen and Stomach are weak, Earth Qi declines; whether injured by cold or temporarily by heat, water and grain fail to digest, waste is not solidified, leading to diarrhea, and conversely, injury by water-dampness. After seasonal illnesses, deficiency-heat in intestines and stomach causes the Three Corpses and Nine Worms to move due to deficiency, invading the five Zang organs, emerging upwards from lips and mouth, and downwards to the anus. Weak Stomach with rebellious Qi changes into vomiting and hiccups. Worms eating viscera cause damage, leading to bloody stool; such cases result in death. The etiology lies in slight Spleen and Stomach deficiency, declining Earth Qi, invasion by water-dampness, and worm movement causing disease, hence named Shi.
It is also said: There is a type of Tian Xing Shi (Epidemic Dampness/Parasitic Disease). Initially unnoticed, walking and sitting feel normal, but there is constant lack of energy, or slight diarrhea, or no diarrhea. Once the disease forms, it turns into vomiting, indicating worms are eating inside the viscera.
It is also said: There is a Ji Jie Shi (Acute Knotting Dampness). It begins with abdominal pain and diarrhea, with pus and blood mixed in discharge. Once formed, it reverses to constipation of both large and small bowels, fullness and pain in head and neck, urgency and fullness in the lower abdomen, and inability to sit or stand comfortably. This is also internal consumption of the five Zang organs. In all such cases, although initial symptoms do not manifest externally, the heart and abdomen are constantly restless. Until the critical stage, sores appear in the mouth and anus, followed by death.