（《本事》）
治肠风、脏毒下血（血之在身，有阴有阳。阳者顺气而行，循流脉中，调和五脏，洒陈
六腑，谓之营血；阴者居于络脉，专守脏腑，滋养神气，濡润筋骨。若感内外之邪而受伤，
则或循经之阳血，至其伤处为邪气所沮，漏泄经外；或居络之阴血，因留着之邪溃裂而出，
则皆渗入肠胃而泄矣。世俗率以肠风名之，不知风乃六淫之一耳，若肠胃受火热二淫，与寒
燥湿怫郁其气，及饮食劳力伤其阴络之血者，亦可谓之肠风乎。《针经》曰∶阳络伤则血外
溢而吐衄，阴络伤则血内溢而便溺。戴氏以随感而见，色鲜者为肠风；积久而发，色瘀者为
脏毒。又云∶色鲜为热，自大肠气分来；色瘀为寒，自小肠血分来。或曰肠风者风邪淫胃，
脏毒者湿
槐花（炒） 侧柏（叶杵） 荆芥（炒黑） 枳壳（炒）等分。为末。每三钱，米饮
下。
此手足阳明药也。侧柏养阴燥湿，最清血分；槐花疏肝泻热，能凉大肠；荆芥散瘀搜风
（为风病血病要药）；枳壳宽肠利气（此病多由湿热风燥之邪，如久不愈者，不宜纯用寒凉，
须兼温补及升举药。大法凉血用槐角、地榆、扁柏、条芩、炒连、栀子、生地；和血用阿胶、
当归、川芎、白芍；风湿用秦艽、防风、荆芥、苍术、茯苓；血瘀少加桃仁、红花、苏木；
宽肠用枳壳；升举用升麻；生血补气加人参、黄 、白术、甘草。柏叶生而向西，禀金兑之
正气，能制肝木，木主升，金主降，升降相配，夫妇之道和，则血得以归肝，故仲景治吐血
不止，气血虚寒，用柏叶汤，柏叶、干姜各三两，艾三把，马粪汁一升。合煮服。马属午为
离，假
本方除柏叶、荆芥，加当归、黄芩、防风、地榆，酒糊丸，名槐角丸（《局方》）∶治同
（凉血疏风）。本方加当归、生地、川芎，入乌梅、生姜煎，名加减四物汤（《济生》）∶治同
（补血凉血。若以风为虚象者，盖非风客于肠胃故也）。本方除柏叶、枳壳，加当归、川芎、
熟地、白术、青皮、升麻，亦名槐花散，又名当归和血散（东垣）∶治肠 下血，湿毒下血。
本方除柏叶、枳壳，加青皮等分，亦名槐花散（洁古）∶治血痢腹不痛，不里急后重。单用
槐花、荆芥炒黑，为
(From *Ben Shi Fang*)
Treats hematochezia caused by Changfeng (Intestinal Wind) and Zangdu (Visceral Toxin). (Blood in the body is divided into Yin and Yang. The Yang type follows Qi, flows within the meridians, harmonizes the Five Zang organs, and distributes to the Six Fu organs; this is called Ying Blood (Nutritive Blood). The Yin type resides in the collateral vessels, specifically guarding the Zang and Fu organs, nourishing Shen Spirit, and moistening sinews and bones. If injured by internal or external pathogenic factors, either the Yang blood following the meridians may be obstructed by pathogens at the site of injury and leak out of the meridians; or the Yin blood residing in the collaterals may rupture due to lingering pathogens and exit. In both cases, they seep into the intestines and stomach and are excreted. Laypeople generally term this condition Changfeng, not knowing that "Wind" is merely one of the Six Excesses. If the intestines and stomach are affected by Fire and Heat pathogens, or if Cold, Dryness, and Dampness stagnate and block Qi mechanism, or if diet and overwork injure the blood of the Yin collaterals, can these also be termed Changfeng? *Zhen Jing* states: Injury to Yang collaterals causes blood to overflow externally, resulting in hematemesis or epistaxis; injury to Yin collaterals causes blood to overflow internally, resulting in hematuria or hematochezia. Dai Shi posits that onset with sudden manifestation and bright red blood color is Changfeng; onset after accumulation over time and dark, clotted blood color is Zangdu. Furthermore, it is stated: Bright red color indicates Heat, originating from the Qi aspect of the Large Intestine; dark/clotted color indicates Cold, originating from the Blood aspect of the Small Intestine. Some argue: Changfeng involves Wind pathogens disrupting the Stomach, while Zangdu involves Dampness...)
Sophorae Flors (Stir-fried), Platycladi Cacumen (Leaves pounded), Schizonepetae Spica (Stir-fried until black), Aurantii Fructus Immaturus (Stir-fried), in equal proportions. Pulverized. Take 3 qian per dose, administered with rice water decoction.
These are herbs for the Hand and Foot Yangming meridians. Platycladi Cacumen nourishes Yin and dries Dampness, most effectively clearing Heat from the Blood aspect; Sophorae Flors soothes the Liver and drains Heat, capable of cooling the Large Intestine and stopping bleeding; Schizonepetae Spica disperses stasis and expels Wind (a crucial herb for treating Wind and Blood disorders); Aurantii Fructus Immaturus expands the intestines and promotes Qi movement (This disease is mostly caused by Damp-Heat, Wind, or Dryness pathogens. If chronic and unresponsive, pure cold-natured herbs should not be used exclusively; warm-tonifying and ascending herbs must be combined. General principles: For cooling blood, use Huaijiao, Diyug, Bianbai, Tiaohuangqin, Chao Lian, Zhizi, Shengdi; for harmonizing blood, use Ejiao, Danggui, Chuanxiong, Baishao; for Wind-Damp, use Qinjiao, Fangfeng, Jingjie, Cangzhu, Fuling; for blood stasis, add small amounts of Taoren, Honghua, Sumu; for expanding intestines, use Zhike; for ascending, use Shengma; for generating blood and tonifying Qi, add Renshen, Huangqi, Baizhu, Gancao. Platycladi Cacumen grows facing west, inheriting the righteous Qi of Metal/Dui, capable of restraining Liver Wood. Wood governs ascending, Metal governs descending; when ascending and descending coordinate, akin to the harmony between husband and wife, blood returns to store in the Liver. Thus, Zhang Zhongjing treated persistent hematemesis due to Qi and Blood deficiency and Cold using Baiye Tang, composed of Baiye and Ganjiang each 3 liang, Ai Ye 3 bundles, and Ma Fen Zhi 1 sheng. Boiled together and taken. Horses belong to Wu/Fire, corresponding to Li trigram, borrowing...)
Removing Baiye and Jingjie from this formula, adding Danggui, Huangqin, Fangfeng, and Diyug, and forming pills with wine paste, named Huaijiao Wan (*Ju Fang*): Treats the same conditions (Functions: Cooling blood and expelling Wind). Adding Danggui, Shengdi, and Chuanxiong to this formula, decocting with Wumei and Shengjiang, named Jiajian Siwu Tang (*Jisheng Fang*): Treats the same conditions (Functions: Nourishing blood and cooling blood. If Wind is considered a sign of deficiency, it implies Wind is not lodging in the intestines and stomach). Removing Baiye and Zhike from this formula, adding Danggui, Chuanxiong, Shudi, Baizhu, Qingpi, and Shengma, also named Huaihua San, alternatively known as Danggui Hexue San (Li Dongyuan): Treats Changfeng hematochezia and Shidu hematochezia. Removing Baiye and Zhike from this formula, adding Qingpi in equal proportions, also named Huaihua San (Zhang Jiegu): Treats bloody dysentery without abdominal pain, and without tenesmus. Using only Huaihua and Jingjie stir-fried until black, pulverized...