论曰小肠者，受盛之官，化物出焉，承奉胃司，受盛糟粕。受已复化传于大肠，是谓化
物而出也。其经有寒，则亦传于大肠，故化物难，而大肠中懊痛，便利赤白，脉经谓小肠寒
则令人下重便脓血者是也。
治小肠虚寒痛下赤白，肠滑后重。干姜黄连汤方
干姜（炮三两） 当归（切焙） 黄柏（去粗皮） 地榆（锉各四两） 黄连（去须） 阿
胶（炙令燥各二
上七味。粗捣筛，每服五钱匕。水一盏半，煎至一盏，去滓温服日三。
治小肠受寒，腹痛下重，便利脓血。浓朴散方
浓朴（去粗皮生姜汁炙锉） 黄连（去须微炒） 干姜炮 当归（切焙各一两） 白茯
苓（去黑皮） 无食子（各半两）
上六味。捣罗为细散，每服二钱匕，粥饮调下，食前服。
治小肠有寒，下利赤白，腹痛下重。木香汤方
木香（三分） 黄连（去须微炒） 当归（切微炒各一两） 附子（炮裂去皮脐一两半）
吴茱萸（汤洗七遍焙干炒半两） 浓朴（去粗皮生姜汁炙三两）
上六味。粗捣筛，每服三钱匕。以水一盏，煎至七分，去滓稍热服，食前。
治小肠寒，下利赤白。乌梅丸方
乌梅（一百枚） 干姜（炮） 黄连（去须各三两） 当归（切焙） 蜀椒（去目并闭
口者炒出汗） 细辛（去苗叶） 附子（炮裂去皮脐） 桂（去粗皮） 黄柏（去粗皮锉） 人
参（各一两）
上一十味。将九味捣罗为细末，以苦酒渍乌梅一宿，去核蒸令烂，别捣如泥，搅药匀，
更入炼蜜少许，和丸如梧桐子大。每服十丸至二十丸，米饮下，食前日三。
治小肠寒，便利赤白，肠滑。木香丸方
木香 黄连（去须） 诃子皮 无食子（各半两） 赤石脂（一两） 浓朴（去粗皮生
姜汁炙锉） 当归（切焙各三分）
上七味，捣罗为细末，炊枣肉和丸，如梧桐子大，每服二十丸，温米饮下，食前。
治小肠寒，肠中懊痛，下赤白。阿胶汤方
阿胶（炙燥二两） 桂（去粗皮） 生姜（切焙干各半两） 黄连（去须三分）
上四味。粗捣筛，每服五钱匕。水一盏半，煎至一盏，去滓稍热服，日三。
Commentary states: The Small Intestine is the official responsible for receiving and containing, where transformation of substances occurs. It receives instructions from the Stomach's function, accepting and containing dregs. After acceptance, it transforms again and transmits to the Large Intestine; this is called transforming substances and discharging them. If its meridian suffers from Cold, the pathogen also transmits to the Large Intestine, thus making the transformation of substances difficult, causing restlessness and pain in the Large Intestine, and discharge of red and white pus and blood. The *Mai Jing* (Pulse Classic) states that Cold in the Small Intestine causes a sensation of heaviness in the lower part and passage of pus and blood, which is exactly this condition.
Ganjiang Lianhuang Tang (Dry Ginger and Coptis Decoction) for treating deficiency-Cold pain of the Small Intestine, passage of red and white stool, intestinal slipping, and tenesmus.
Gan Jiang (Zingiberis Rhizoma Preparatum, processed, 3 liang) Dang Gui (Angelicae Sinensis Radix, sliced and baked) Huang Bo (Phellodendri Cortex, coarse skin removed) Di Yu (Sanguisorbae Radix, crushed, each 4 liang) Lian Zhu (Coptidis Rhizoma, mustache removed) E Jiao (Colla Corii Asini, roasted until dry, each 2 liang).
The above seven herbs are coarsely pounded and sieved. Each dose consists of 5 qian bi. Add 1.5 zhan of water, decoct until 1 zhan remains, remove the dregs, and take warm, three times daily.
Nongpu San (Magnolia Bark Powder) for treating Cold invasion of the Small Intestine, abdominal pain with tenesmus, and passage of pus and blood.
Hou Po (Magnoliae Officinalis Cortex, coarse skin removed, processed with ginger juice and crushed) Huang Lian (Coptidis Rhizoma, mustache removed, slightly stir-fried) Gan Jiang (Zingiberis Rhizoma, processed) Dang Gui (Angelicae Sinensis Radix, sliced and baked, each 1 liang) Bai Fu Ling (Poria, black skin removed) Wu Shi Zi (Terminalia chebula Retz., each 0.5 liang).
The above six herbs are pounded and sifted into fine powder. Each dose is 2 qian bi, taken with gruel drink before meals.
Muxiang Tang (Aucklandia Decoction) for treating Cold in the Small Intestine, passage of red and white diarrhea, abdominal pain, and tenesmus.
Mu Xiang (Aucklandiae Radix, 3 fen) Huang Lian (Coptidis Rhizoma, mustache removed, slightly stir-fried) Dang Gui (Angelicae Sinensis Radix, sliced and slightly stir-fried, each 1 liang) Fu Zi (Aconiti Lateralis Radix Preparata, cracked by processing, skin and navel removed, 1.5 liang) Wu Zhu Yu (Evodiae Fructus, washed seven times with water, baked dry and stir-fried, 0.5 liang) Hou Po (Magnoliae Officinalis Cortex, coarse skin removed, processed with ginger juice, 3 liang).
The above six herbs are coarsely pounded and sieved. Each dose is 3 qian bi. Add 1 zhan of water, decoct until 0.7 zhan remains, remove the dregs, and take slightly warm before meals.
Wumei Wan (Mume Pill) for treating Cold in the Small Intestine and passage of red and white diarrhea.
Wu Mei (Mume Fructus, 100 pieces) Gan Jiang (Zingiberis Rhizoma Preparata, processed) Huang Lian (Coptidis Rhizoma, mustache removed, each 3 liang) Dang Gui (Angelicae Sinensis Radix, sliced and baked) Shu Jiao (Zanthoxyli Pericarpium, remove eyes and closed ones, stir-fry until oil comes out) Xi Xin (Asari Radix et Rhizoma, remove seedlings and leaves) Fu Zi (Aconiti Lateralis Radix Preparata, cracked by processing, skin and navel removed) Gui Zhi (Cinnamomi Ramulus, coarse skin removed) Huang Bo (Phellodendri Cortex, coarse skin removed and crushed) Ren Shen (Ginseng Radix, each 1 liang).
The above ten herbs: Pound nine herbs (excluding Wu Mei) into fine powder. Soak Wu Mei in bitter vinegar overnight, remove pits, steam until soft, pound separately into paste, mix evenly with the powder, add a little refined honey, and form pills the size of wutong seeds. Take 10-20 pills per dose with rice drink before meals, three times daily.
Muxiang Wan (Aucklandia Pill) for treating Cold in the Small Intestine, passage of red and white stool, and intestinal slipping.
Mu Xiang (Aucklandiae Radix) Huang Lian (Coptidis Rhizoma, mustache removed) He Zi Pi (Terminalia Chebulae Pericarpium) Wu Shi Zi (Terminalia chebula Retz., each 0.5 liang) Chi Shi Zhi (Halloysit Rubrum, 1 liang) Hou Po (Magnoliae Officinalis Cortex, coarse skin removed, raw, processed with ginger juice and crushed) Dang Gui (Angelicae Sinensis Radix, sliced and baked, each 3 fen).
The above seven herbs are pounded and sifted into fine powder, mixed with steamed jujube flesh to form pills the size of wutong seeds. Take 20 pills per dose with warm rice drink before meals.
Ejiao Tang (Colla Corii Asini Decoction) for treating Cold in the Small Intestine, restlessness and pain in the intestines, and passage of red and white diarrhea.
E Jiao (Colla Corii Asini, roasted until dry, 2 liang) Gui Zhi (Cinnamomi Ramulus, coarse skin removed) Sheng Jiang (Zingiberis Rhizoma Recens, sliced and baked dry, each 0.5 liang) Huang Lian (Coptidis Rhizoma, mustache removed, 3 fen).
The above four herbs are coarsely pounded and sieved. Each dose is 5 qian bi. Add 1.5 zhan of water, decoct until 1 zhan remains, remove the dregs, and take slightly warm, three times daily.