《金匮》云∶香港脚上入少腹不仁，肾气丸主之。盖湿淫之气，自下侵上，肾虚阳弱，不
能御
之，则渐入少腹而痹着不仁矣。肾气丸理肾之气者也，肾气得理，邪气自下，而不仁者仁矣
。
肾气丸
熟地黄（八两） 萸肉 山药（各四两） 茯苓 泽泻 丹皮（各三两） 附子（制） 肉桂（
各一两）
上八味末之，炼蜜为丸梧子大，每服三钱，空心淡盐汤下。
《三因》吴萸丸 治香港脚入腹，腹中不仁，喘急欲死。
吴茱萸（汤洗七次） 木瓜（去瓤，切片，日干，等分）
上为末，酒糊丸梧子大，每服五十丸，至百丸，酒饮任下，或以木瓜蒸烂，研膏为丸尤妙。
香港脚上气者，风毒湿气，循经上入于肺故也。肺主气而司呼吸，邪气入之，则气道奔迫
，升降不顺，故令上气喘满，甚者不得偃卧也。
桑白皮汤
桑白皮（炙，二两） 陈皮（一两） 葶苈（苦者炒研，一两） 杏仁（去皮尖，一两）
共为末，水煎，姜枣汤，入末三钱，再沸温服，当利一二行，肿气下却瘥。三五日服一
次。一方无杏仁。
《活人》桑白皮散
桑白皮 郁李仁（各一两） 赤苓（二两） 木香 防己（各一两半） 紫苏子 木通 槟榔
每服三钱，姜三片，水煎。
香港脚冲心之候，令人心胸烦闷，呕吐气急，甚者脉绝不出欲死也。盖风湿毒瓦斯，初从足
起，久而不治，则上冲心胃之分，最为急候。下气，除湿，泄毒，不可缓也。
吴茱萸汤
吴茱萸（半两） 木瓜（一两） 槟榔（二两，鸡心者佳）
水煎五钱，入竹叶一把，以快利为度。一法 咀，每服八钱，水一中盏半，生姜五片，
煎至一盏，去滓温服无时。
苏长史茱萸汤
吴萸（六升） 木瓜（二枚）
水一斗三升，煮取三升，分三服。如人行十里久，进一服。或吐、或汗、或利、或大热闷，
木香汤
青木香 生黑豆皮（二两） 大黄（炒） 紫雪（一两）
水煎五钱，入紫雪三钱，分二服，顷再服，当下燥粪。
杉木节汤
杉木节 橘叶（一升） 大腹（七枚，连皮） 童便（三升）
同煮取一升半，分二服。如一服得快利即止。
唐柳宗元患香港脚，夜半痞绝，左胁有块如大石，且死，困塞不知人三日矣，家人皆号哭
。荣阳郑洵美传此方服之。半日顷，气通立愈。
犀角散 治香港脚冲心，烦喘闷乱，头痛口干，坐卧不得。
犀角屑 枳壳（去瓤，麸炒） 沉香（各七钱半） 紫苏梗叶 槟榔 麦冬（去心） 赤苓（
去皮，各一两） 木香 防风（各半两） 石膏（研细，二两）
上 咀，每服八钱，水一中盏半，煎至一大盏，去渣，入淡竹沥一合，更煎一二沸，温
服不拘时。
The *Jingui Yaolue* (Essential Prescriptions of the Golden Cabinet) states: When Hongjiaojiao (a disease characterized by swelling and numbness of the lower legs) pathogenic factors ascend to the lower abdomen, causing insensibility in that area, Shenqi Wan (Kidney Qi Pill) should be used. This is because dampness pathogenic factors invade from below and move upward; if Kidney Qi is deficient and Yang energy is weak, failing to resist the invasion, the pathogen gradually enters the lower abdomen, leading to Bi obstruction (blockage of meridians and collaterals) and resulting in insensibility. Shenqi Wan regulates Kidney Qi; once Kidney Qi is harmonized, the pathogenic factors naturally descend, and the insensibility resolves.
Shenqi Wan (Kidney Qi Pill)
Prepared Rehmanniae Radix (Shu Dihuang, 8 liang)
Cornus Officinalis Fruit (Rougui/Shanyuzhuyu, 4 liang)
Chinese Yam (Shanyao, 4 liang)
Poria (Fuling, 3 liang)
Alisma Rhizome (Zexie, 3 liang)
Moutan Cortex (Danpi, 3 liang)
Prepared Aconiti Lateralis Radix (Fu Zi, 1 liang)
Cinnamon Twig (Rougui, 1 liang)
Grind the above eight ingredients into fine powder, mix with refined honey to form pills the size of wutong seeds. Take 3 qian per dose, administered on an empty stomach with light salt water decoction.
Wuyu Wan (Evodia Pill) from *Sanyin Fang* (Treatise on the Causes and Manifestations of All Diseases) treats Hongjiaojiao where pathogenic factors enter the abdomen, causing abdominal insensibility and severe asthma approaching death.
Evodiae Fructus (Wuyu, washed seven times with hot water)
Chaenomelis Fructus (Mu Gua, deseeded, sliced, sun-dried, equal proportion to Evodiae Fructus)
Grind into powder, bind with wine paste to form pills the size of wutong seeds. Take 50 to 100 pills per dose, washed down with wine. Alternatively, steam Chaenomelis Fructus until soft, grind into paste for pill formation, which is particularly effective.
The condition known as "Hongjiaojiao Shangqi" (Ascending Qi in Hongjiaojiao) occurs because wind-toxicity and dampness follow the meridians upward into the Lung. The Lung governs Qi and respiration; when pathogenic factors invade, the airway becomes tight, and the ascending and descending mechanisms are obstructed, causing upper asthma and fullness. In severe cases, the patient cannot lie flat.
Sangbaipi Tang (Mulberry Bark Decoction)
Mori Cortex (Sangbaipi, processed with heat, 2 liang)
Citrus Reticulatae Pericarpium (Chenpi, 1 liang)
Descurainiae Semen Lepidii Sem et Erucae Semen (Tinglizi, bitter variety stir-fried and crushed, 1 liang)
Prunus Armeniaca Seed (Xingren, peeled and de-pitted, 1 liang)
Grind together into powder. Decoct in water, add Ginger and Jujube soup, then add 3 qian of the powder. Boil again and take warm. It should induce one or two bowel movements, reducing swelling and descending rebellious Qi to achieve recovery. Take once every three to five days. Another version excludes Xingren.
Sangbaipi San (Mulberry Bark Powder) from *Ren Shu* (The Living People's Book)
Mori Cortex (Sangbaipi, 1 liang)
Prunus Suschuanensis Seed (Yuliren, 1 liang)
Polyporus (Chiling, 2 liang)
Costi Rhizoma (Muxiang, 1.5 liang)
Stephaniae Tetrandrae Radix (Fangji, 1.5 liang)
Perillae Fructus (Zisuzi, amount not specified in original snippet but implied part of formula)
Akebia Caulis (Mutong, amount not specified)
Areca Seed (Binglang, amount not specified)
Take 3 qian per dose, with 3 slices of fresh ginger, decocted in water.
The syndrome of "Hongjiaojiao Chongxin" (Hongjiaojiao Rushing to the Heart) manifests as chest and heart vexation and oppression, vomiting, and rapid breathing. In severe cases, the pulse may disappear, indicating a critical state nearing death. This is because wind-damp toxicity originates in the feet; if untreated for a long time, it rushes upward to the Heart and Stomach regions, constituting a most urgent condition. Methods to direct Qi downward, eliminate dampness, and drain toxicity must be employed without delay.
Wuyu Tang (Evodia Decoction)
Evodiae Fructus (Wuyu, 0.5 liang)
Chaenomelis Fructus (Mu Gua, 1 liang)
Areca Seed (Binglang, 2 liang, chicken-heart shape preferred)
Decoct 5 qian of herbs in water, adding a handful of Bamboo Leaves. Stop when bowel movement is unobstructed. Another method: coarsely crush the herbs, take 8 qian per dose, add 1.5 zhan of water and 5 slices of fresh ginger, decoct to 1 zhan, strain, and take warm at any time.
Su Changshi Zuyu Tang (Director Su's Evodia Decoction)
Evodiae Fructus (Wuyu, 6 sheng)
Chaenomelis Fructus (Mu Gua, 2 fruits)
Add 13 sheng of water, boil to obtain 3 sheng of liquid. Divide into three doses. Administer one dose after the patient has walked approximately ten li. If vomiting, sweating, diarrhea, or high fever with oppression occurs, use Muxiang Tang.
Muxiang Tang (Costus Decoction)
Aquilariae Lignum Resinatum (Qingmuxiang)
Vigna Radiata Testa (Shengheidoupi, 2 liang)
Rhei Radix et Rhizoma (Dahuang, stir-fried)
Zixue (Purple Snow, 1 liang)
Decoct 5 qian of herbs in water, add 3 qian of Zixue. Divide into two doses. Take the second dose shortly after the first. It should expel dry feces.
Shanjiejie Tang (Fir Branch Joint Decoction)
Sabinae Ramulus (Shanjiejie)
Citrus Reticulatae Folium (Juye, 1 sheng)
Arecae Pericarpium (Dafu, 7 pieces, with peel)
Pueri Urine (Tongbian, 3 sheng)
Boil together to obtain 1.5 sheng of liquid. Divide into two doses. Stop if one dose produces rapid relief/bowel movement.
Liu Zongyuan of the Tang Dynasty suffered from Hongjiaojiao. At midnight, his condition suddenly worsened with blockage; a mass like a large stone formed in his left hypochondrium. He was near death, unconscious and blocked for three days, while his family wept bitterly. Zheng Xunmei from Yingyang transmitted this prescription. After taking it, within half a day, his Qi flowed freely, and he recovered immediately.
Xijiao San (Rhinoceros Horn Powder) treats Hongjiaojiao rushing to the Heart, causing vexation, asthma, chest oppression, confusion, headache, dry mouth, and inability to sit or lie down comfortably.
Rhinoceros Horn (Xijiao jian)
Aurantii Fructus Immaturus (Zhike, deseeded, stir-fried with bran, 0.75 qian each)
Agarwood (Chenxiang, 0.75 qian each)
Perillae Caulis and Folium (Zisugengye)
Areca Seed (Binglang)
Ophiopogonis Radix (Maidong, de-core)
Polyporus (Chiling, peeled, 1 liang each)
Costi Rhizoma (Muxiang)
Saposhnikoviae Radix (Fangfeng, 0.5 liang each)
Gypsum Fibrosum (Shigao, finely ground, 2 liang)
Coarsely crush the above. Take 8 qian per dose, add 1.5 zhan of water, decoct to 1 large zhan. Strain, add 1 he of Light Bamboo Juice (Danzhuli), boil for one or two more boils, and take warm at any time.