肠风，独在胃与大肠出。若兼风者，苍术、秦艽、芍药、香附。
入方
黄芩 秦艽 槐角 升麻 青黛
治肠风下血
滑石 当归 生地黄 黄芩 甘草 苍术（等分）
上以水煎服，或以苍术、生地黄，不犯铁器为末，丸服。
又方
茄蒂（烧存性） 栀子（炒）
上为末，捣饭丸如梧子大。每服空心一百丸，米汤下。
又方 便血久远，伤血致虚，并麻风癣见面者。
龟板（二两，酥炙） 升麻 香附（各五钱） 芍药（一两五钱） 侧柏叶 椿根皮（七钱五分）
上为末，粥丸。以四物汤加白术、黄连、甘草、陈皮作末，汤调送下丸药。
又方 脉缓大，口渴，月经紫色，劳伤挟湿。
白术（五钱） 黄柏（炒） 生地黄 白芍（各三钱） 地榆（二钱） 黄芩（二钱） 香附（二钱）
上为末，蒸饼丸服。
又方 治积热便血。
苍术 陈皮（一两五钱） 黄连 黄柏 条芩（各七钱五分） 连翘（五钱）
上为末，生地黄膏六两，丸如梧子大。每服五七十丸，白汤下。
又方
肠风脱露，以车荷鸣五七个，焙干，烧灰，醋调搽。仍忌湿面酒辛热物。
〔附录〕肠胃不虚，邪气无从而入。人惟坐卧风湿，醉饱房劳，生冷停寒，酒面积热，以
致荣血失道，渗入大肠，此肠风藏毒之所由作也。挟热下血，清而色鲜，腹中有痛；挟冷下
血，浊以色黯，腹中略痛；清则为肠风，浊则为脏毒。有先便而后血者，其来也远；有先
血而后便者，其来也近。世俗粪前粪后之说，非也。治法大要，先当解散肠胃风邪，热则用
败毒散
热者加茯苓、槐花，冷者加茯苓、木香，此则自根自本之论也。虽然精气血气，生于谷气
，靖为大肠下血，大抵以胃药收功，以四君子汤、参苓白术散、枳壳散、小乌沉汤和之。
一回，血自循于经络矣。肠风者，邪气并入，随感随见；脏毒者，蕴积毒久而始见，《三因
方》五痔、肠风、脏毒，辨之甚详。前二证皆以四物汤加刺 皮。
附方
蒜连丸（一名金屑万应膏）
独头蒜（十个） 黄连（不以多少）
上先用独蒜煨香熟，和药杵匀，丸如梧子大。空心米汤下四十丸。
又方 治肠风。
香附（一两，炒） 枳壳（七钱五分，炒） 当归（五钱） 川芎（五钱） 槐花（炒） 甘草（炙，各
二钱五分）
上为粗末。每服三钱，水煎，生姜三片，枣一个。
败毒散 见瘟疫。
不换金正气散
浓朴（姜制） 藿香 甘草（炙） 半夏 苍术（米甘浸） 陈皮（去白）
上等分，姜三片，枣二个煎，食前热服。
芎归汤
川芎 当归
上等分，水煎。
参苓白术散 见脾胃类。
枳壳散
枳壳（麸炒去穣） 槐子（微炒黄） 荆芥穗（各五钱）
上为末。每服三钱，薄粟米粥调下，如人行一二里，再用粥压下，日进二三服。
小乌沉汤
香附（二十两） 乌药（十两） 甘草（炙，一两）
上为末。汤调下。
肠风，病位仅在胃与大肠。若兼夹风邪，可加入苍术、秦艽、芍药、香附。
治疗肠风下血：滑石、当归、生地黄、黄芩、甘草、苍术（以上各等分）。
将上述药物用水煎服；或者仅用苍术、生地黄，注意不接触铁器，研磨成粉末，制成丸剂服用。
又一方：茄蒂（烧至存性，即外部焦黑内部保留药效）、栀子（炒制）。
将上述药物研为粉末，用米饭捣烂制成如梧桐子大小的丸剂。每次空腹服用一百丸，米汤送服。
又一方：适用于便血日久，耗伤血液导致虚损，以及患有麻风癣并出现面部症状者。
龟板（二两，用酥油炙烤）、升麻、香附（各五钱）、芍药（一两五钱）、侧柏叶、椿根皮（七钱五分）。
将上述药物研为粉末，用米粥调和制成丸剂。另取四物汤加白术、黄连、甘草、陈皮研为粉末，用汤剂调服此丸药。
又一方：适用于脉象缓大，口渴，月经颜色紫暗，因劳损伤及湿邪内蕴者。
白术（五钱）、黄柏（炒制）、生地黄、白芍（各三钱）、地榆（二钱）、黄芩（二钱）、香附（二钱）。
将上述药物研为粉末，用蒸饼（发酵面食）糊制成丸剂服用。
又一方：治疗积热导致的便血。
苍术、陈皮（一两五钱）、黄连、黄柏、条芩（即黄芩，各七钱五分）、连翘（五钱）。
将上述药物研为粉末，用六两生地黄膏作为粘合剂，制成如梧桐子大小的丸剂。每次服用五七十丸，白开水送服。
又一方：治疗肠风脱肛（直肠脱出），用车前草（车荷鸣）五到七个，焙干后烧成灰，用醋调匀外搽患处。同时忌食湿面、酒类、辛辣及热性食物。
〔附录〕肠胃功能不虚时，邪气无法侵入。人之所以患病，多因坐卧于风湿之中，醉酒后饱食或房事过度，生冷食物停滞体内产生寒邪，酒积转化为内热，从而导致营血运行失常，渗入大肠，这就是肠风和脏毒产生的原因。挟带热邪的下血，血色清亮鲜红，腹部有疼痛感；挟带寒邪的下血，血色浑浊暗淡，腹部仅有轻微疼痛；血色清亮的称为肠风，血色浑浊的称为脏毒。有先排便后出血的，说明病位较远；有先出血后排便的，说明病位较近。世俗认为粪前出血和粪后出血的说法是不正确的。治疗的大要原则，首先应当疏散肠胃中的风邪，属热的用败毒散，热重者加茯苓、槐花，属冷者加茯苓、木香，这是从根源上治疗的理论。虽然精、气、血都源于谷气，但针对大肠下血，大体上以调理胃气的药物收功，可用四君子汤、参苓白术散、枳壳散、小乌沉汤来调和。这样调理一次，血液自然能回归经络正常运行。肠风，是邪气并入，随感受随即显现；脏毒，是蕴积毒素日久才显现，《三因方》对五痔、肠风、脏毒辨析得非常详细。前两种证候都以四物汤加刺皮（推测指某种树皮类药材，原文可能有缺字或通假，此处依原文提取）治疗。
附方：
蒜连丸（又名金屑万应膏）：独头蒜（十个）、黄连（适量）。
先将独蒜煨至香熟，与药物一起捣匀，制成如梧桐子大小的丸剂。空腹时用米汤送服四十丸。
又一方：治疗肠风。
香附（一两，炒制）、枳壳（七钱五分，炒制）、当归（五钱）、川芎（五钱）、槐花（炒制）、甘草（炙制，各二钱五分）。
将上述药物制成粗末。每次服用三钱，加水煎煮，加入生姜三片、大枣一个。
败毒散：见瘟疫章节。
不换金正气散：浓朴（姜汁制）、藿香、甘草（炙制）、半夏、苍术（米泔水浸泡）、陈皮（去白）。
以上药物等分，加生姜三片、大枣二个煎煮，饭前热服。
枳壳散：枳壳（麸炒去瓤）、槐子（微炒至黄）、荆芥穗（各五钱）。
将上述药物研为粉末。每次服用三钱，用薄粟米粥调服，服药后行走一二里路，再用粥压下，每日服用二三次。
Intestinal wind (Changfeng) originates solely from the stomach and large intestine. If accompanied by wind pathogen, add Atractylodis Rhizoma (Cangzhu), Gentianae Macrophyllae Radix (Qinjiao), Paeoniae Radix (Shaoyao), and Cyperi Rhizoma (Xiangfu).
Prescription: Scutellariae Radix (Huangqin), Gentianae Macrophyllae Radix (Qinjiao), Sophorae Fructus (Huaijiao), Cimicifugae Rhizoma (Shengma), Indigo Naturalis (Qingdai).
Treating intestinal wind with bloody stool: Talcum (Huashi), Angelicae Sinensis Radix (Danggui), Rehmanniae Radix Recens (Shengdihuang), Scutellariae Radix (Huangqin), Glycyrrhizae Radix et Rhizoma (Gancao), Atractylodis Rhizoma (Cangzhu) (all in equal parts).
Decoct the above herbs in water for oral administration; or use only Atractylodis Rhizoma (Cangzhu) and Rehmanniae Radix Recens (Shengdihuang), ensuring no contact with iron vessels, grind into powder, and administer as pills.
Another prescription: Eggplant peduncle (Qiedi, charred to retain efficacy), Gardeniae Fructus (Zhizi, stir-fried).
Grind the above into powder, mix with rice paste to form pills the size of sophora seeds. Take one hundred pills on an empty stomach, washed down with rice soup.
Another prescription: For chronic bloody stool causing blood deficiency, and for those suffering from leprosy-like skin sores manifesting on the face.
Testudinis Carapax et Plastrum (Guiban, two taels, roasted with animal fat), Cimicifugae Rhizoma (Shengma), Cyperi Rhizoma (Xiangfu) (each five qian), Paeoniae Radix (Shaoyao, one tael five qian), Platycladi Cacumen (Cebaiye), Toosendan Cortex (Chungenpi) (seven qian five fen).
Grind the above into powder, bind with congee to make pills. Separately, prepare a powder of Siwu Decoction (Four Substances Decoction) added with Atractylodis Macrocephalae Rhizoma (Baizhu), Coptidis Rhizoma (Huanglian), Glycyrrhizae Radix et Rhizoma (Gancao), and Citri Reticulatae Pericarpium (Chenpi). Mix this powder with decoction to swallow the pills.
Another prescription: For cases with slow and large pulse, thirst, purple menstrual blood, and labor injury complicated by dampness.
Atractylodis Macrocephalae Rhizoma (Baizhu, five qian), Phellodendri Cortex (Huangbai, stir-fried), Rehmanniae Radix Recens (Shengdihuang), Paeoniae Radix Alba (Baishao) (each three qian), Sanguisorbae Radix (Diyu, two qian), Scutellariae Radix (Huangqin, two qian), Cyperi Rhizoma (Xiangfu, two qian).
Grind the above into powder, bind with steamed bread dough to make pills.
Another prescription: Treating bloody stool due to accumulated heat.
Atractylodis Rhizoma (Cangzhu), Citri Reticulatae Pericarpium (Chenpi, one tael five qian), Coptidis Rhizoma (Huanglian), Phellodendri Cortex (Huangbai), Scutellariae Radix (Tiaohuangqin) (each seven qian five fen), Forsythiae Fructus (Lianqiao, five qian).
Grind the above into powder, use six taels of Rehmanniae Radix Recens paste as binder to form pills the size of sophora seeds. Take fifty to seventy pills each time, washed down with plain warm water.
Another prescription: For intestinal wind with rectal prolapse, take five to seven plants of Plantaginis Herba (Cheqiancao), dry by roasting, burn to ash, and apply externally mixed with vinegar. Avoid wet noodles, alcohol, spicy, and hot-natured foods.
[Appendix] When the stomach and intestines are not deficient, evil qi has no pathway to enter. Illness arises primarily from sitting or lying in wind-dampness, excessive drinking and overeating, sexual exhaustion, retention of cold from raw and cold foods, and accumulation of heat from wine. This causes Ying-blood (nutritive blood) to lose its proper course and seep into the large intestine, which is the origin of intestinal wind and internal toxin. Bloody stool accompanied by heat is clear and bright red, with abdominal pain; bloody stool accompanied by cold is turbid and dark, with slight abdominal pain. Clear blood is termed intestinal wind; turbid blood is termed internal toxin. Those who pass stool before bleeding have distant lesions; those who bleed before passing stool have proximal lesions. The popular theory distinguishing bleeding before versus after defecation is incorrect. The general principle of treatment is first to dissipate wind evil in the stomach and intestines. For heat patterns, use Baidu San (Toxin-Resolving Powder); for severe heat, add Alisma Rhizoma (Fuling) and Sophorae Flos (Huaihua); for cold patterns, add Alisma Rhizoma (Fuling) and Aucklandiae Radix (Muxiang). This is a fundamental approach addressing the root. Although Jing-essence, Qi, and blood are generated from grain qi, for lower gastrointestinal bleeding, treatment generally concludes with stomach-regulating herbs. Harmonize using Sijunzi Tang (Four Gentlemen Decoction), Shenling Baizhu San (Ginseng, Poria, and Atractylodes Macrocephala Powder), Zhike San (Citrus Aurantium Powder), or Xiao Wuchen Tang (Minor Black Stagnation Decoction). After one round of such regulation, blood will naturally return to the meridians. Intestinal wind manifests immediately upon exposure to evil qi; internal toxin manifests only after long-term accumulation of toxins. *San Yin Fang* (Formulae Due to Three Causes) distinguishes these conditions in detail regarding five types of hemorrhoids, intestinal wind, and internal toxin. Both preceding conditions are treated with Siwu Tang (Four Substances Decoction) plus bark from a specific thorny plant (Ci Pi).
Attached Prescriptions:
Suanlian Wan (Garlic and Coptis Pill, also known as Jin Xie Wan Ying Gao): Single-head garlic (ten cloves), Coptidis Rhizoma (Huanglian, amount as needed).
First, bake the single-head garlic until fragrant and cooked, then pound together with the herb to uniform consistency, forming pills the size of sophora seeds. Take forty pills on an empty stomach with rice soup.
Another prescription: Treating intestinal wind.
Cyperi Rhizoma (Xiangfu, one tael, stir-fried), Aurantii Fructus Immaturus (Zhike, seven qian five fen, stir-fried), Angelicae Sinensis Radix (Danggui, five qian), Ligustici Chuanxiong Rhizoma (Chuanxiong, five qian), Sophorae Flos (Huaihua, stir-fried), Glycyrrhizae Radix et Rhizoma (Gancao, roasted, each two qian five fen).
Grind into coarse powder. Take three qian each time, decoct in water with three slices of fresh ginger and one jujube.
Baidu San (Toxin-Resolving Powder): See section on Epidemic Febrile Diseases.
Buhuanjin Zhengqi San (Non-Swapping Metal Upright Qi Powder): Magnoliae Officinalis Cortex (Noupu, processed with ginger juice), Agastaches Herba (Huoxiang), Glycyrrhizae Radix et Rhizoma (Gancao, roasted), Pinelliae Rhizoma (Banxia), Atractylodis Rhizoma (Cangzhu, soaked in rice wash water), Citri Reticulatae Pericarpium (Chenpi, pith removed).
Equal parts of the above, decoct with three slices of ginger and two jujubes. Take hot before meals.
Xiong Gui Tang (Ligusticum and Angelica Decoction): Ligustici Chuanxiong Rhizoma (Chuanxiong), Angelicae Sinensis Radix (Danggui).
Equal parts, decoct in water.
Shenling Baizhu San (Ginseng, Poria, and Atractylodes Macrocephala Powder): See section on Spleen and Stomach.
Zhike San (Citrus Aurantium Powder): Aurantii Fructus Immaturus (Zhike, bran-roasted, pith removed), Sophorae Semen (Huai Zi, lightly stir-fried until yellow), Schizonepetae Spica (Jingjie Sui) (each five qian).
Grind into powder. Take three qian each time, mix with thin millet porridge. Walk for one to two li after taking, then press down with more porridge. Take two to three times daily.
Xiao Wuchen Tang (Minor Black Stagnation Decoction): Cyperi Rhizoma (Xiangfu, twenty taels), Linderae Radix (Wuyao, ten taels), Glycyrrhizae Radix et Rhizoma (Gancao, roasted, one tael).
Grind into powder. Take mixed with decoction.