病源肺主于皮毛，肾主于水，肾虚则水妄行，流溢于皮肤，故令身体面目悉肿。按之没
指而无汗也，腹如故，不满亦不渴，四肢重而不恶风是也，脉浮者名皮水也。（出第二十卷
中）
深师疗皮水，如肿水气在皮肤中，四肢集集动，木防己汤方。
木防己（三两） 黄 （三两） 桂心（三两） 茯苓（六两） 甘草（二两炙）
上五味切，以水六升，煮取二升分，再服，忌海藻菘菜生葱酢物。（出第十九卷中）
范汪皮水一身面目悉肿，甘草麻黄汤主之方。
甘草（二两炙） 麻黄（四两去节）
上二味，以五升水先煮麻黄再沸，去上沫，乃纳甘草煮得一升，绞去滓，适寒温，先服
一升，重复之，日移二丈所当汗出，汗出勿复服，不汗乃复服，当慎护风寒，数日乃出入，
忌海藻菘菜。（出第二十八卷中）
古今录验皮水，越婢汤加水主之方。
麻黄（六两去节） 大枣（十二枚擘） 白术（四两） 生姜（三两切） 甘草（二两
炙） 石膏
（半斤）
上六味 咀，以水七升，煮麻黄一二沸，去上沫，乃纳余药煮，取二升，绞去滓，适寒
温，服七合，日三，忌同前。（范汪同已上三方并本出仲景伤寒论）
病源肾者，阴气也，主于水，而又主腰脚，肾虚则腰脚血气不足，水之流溢，先从虚而
入，故脚先肿也。（出第二十一卷中）
肘后若肿从脚起稍上进者，入腹则杀人，疗之方。
小豆一斛，煮令极烂，得四五斗汁，温以渍膝以下，日日为之，数日消尽。若已入腹者
不复渍，但煮小豆食之，莫杂吃饭及 （音圭）鱼盐，又专饮小豆汁，无小豆，大豆亦可用，
如
此之
又方
削楠及桐木煮取汁以渍之，并饮少许，如小豆法。（并出第一卷中）
范汪疗水肿从足始，转上入腹则杀人，豚肝方。
生猪肝一具，煮如食法，细切，顿食令尽，不得用盐，可用苦酒，猪重五六十斤以上肝
者，一顿啖尽，百斤以上猪者，分两服。（肘后同）
又若但两足肿者方。
锉葱叶煮令烂以渍之，日三四度，良也。（集验同并出第二十八卷中）
Etiologically, the Lung governs the skin and hair, while the Kidney governs water metabolism. When Kidney deficiency occurs, water flows recklessly and overflows into the skin, causing swelling of the entire body and face. Upon pressing the swollen area, an indentation remains without sweat appearing; the abdomen remains normal in shape, without fullness or thirst; the limbs feel heavy but there is no aversion to wind. If the pulse is floating, this condition is named Pi Shui (Skin Water) [Edema affecting the skin]. (From Volume 20)
The Shen Shi formula treats Pi Shui (Skin Water), characterized by edematous qi within the skin and twitching movements in the four limbs, using the Mugufangji Tang (Cocculus Decoction).
Mugufangji (Stephaniae Tetrandrae Radix) (3 liang), Huangqi (Astragali Radix) (3 liang), Guixin (Cinnamomi Cortex) (3 liang), Fuling (Poria) (6 liang), Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried) (2 liang).
The above five herbs are cut, boiled in 6 sheng of water to obtain 2 sheng of decoction, taken in two doses. Avoid consuming Haizao (Sargassum), Songcai (Brassica rapa var. pekinensis), raw Cong (Allium fistulosum), and vinegar-preserved foods. (From Volume 19)
The Fan Wang formula treats Pi Shui (Skin Water) with swelling of the whole body and face, primarily using the Gancao Mahuang Tang (Licorice and Ephedra Decoction).
Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried) (2 liang), Mahuang (Ephedrae Herba, nodes removed) (4 liang).
The above two herbs are boiled in 5 sheng of water; first boil Mahuang (Ephedrae Herba) until it boils twice, skim off the foam on the surface, then add Gancao (Glycyrrhizae Radix et Rhizoma) and boil to obtain 1 sheng of decoction. Strain out the dregs. When the temperature is suitable, take 1 sheng first. If sweating does not occur, repeat the dose. After walking approximately 2 zhang, sweating should occur. Do not take more after sweating; if no sweat occurs, continue taking it. Carefully protect against wind and cold; only go out after several days. Avoid Haizao (Sargassum) and Songcai (Brassica rapa var. pekinensis). (From Volume 28)
The Jin Gu Lu Yan formula treats Pi Shui (Skin Water), using Yuebi Tang (Yuebi Decoction) plus Baizhu (Atractylodis Macrocephalae Rhizoma) as the main treatment.
Mahuang (Ephedrae Herba, nodes removed) (6 liang), Dazao (Ziziphi Jujubae Fructus, broken) (12 pieces), Baizhu (Atractylodis Macrocephalae Rhizoma) (4 liang), Shengjiang (Zingiberis Rhizoma Recens, sliced) (3 liang), Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried) (2 liang), Shigao (Gypsum Fibrosum) (0.5 jin).
The above six herbs are crushed, boiled in 7 sheng of water; first boil Mahuang (Ephedrae Herba) for one or two boils, skim off the foam, then add the remaining herbs and boil to obtain 2 sheng of decoction. Strain out the dregs. When the temperature is suitable, take 7 he per dose, three times a day. Dietary restrictions are the same as before. (The above three formulas from Fan Wang are originally from Zhang Zhongjing's Shanghan Lun [Treatise on Cold Damage]).
Etiologically, the Kidney belongs to Yin Qi, governs water metabolism, and also governs the waist and legs. Kidney deficiency leads to insufficient blood and qi in the waist and legs; water overflows and enters first through the deficient areas, so swelling begins in the feet. (From Volume 21)
The Zhouhou Beiji Fang: If swelling starts from the feet and progresses slightly upward, entering the abdomen will cause death. The treatment method is as follows.
Xiaodou (Vigna angularis) one hu, boiled until extremely soft, yielding 4-5 dou of juice. Soak the knees and below in the warm juice daily. After several days, the swelling will subside completely. If it has already entered the abdomen, do not soak; instead, boil Xiaodou (Vigna angularis) and eat it. Do not mix with rice, Gui fish, or salt. Drink exclusively Xiaodou (Vigna angularis) juice. If Xiaodou (Vigna angularis) is unavailable, Dadou (Sojae Semen Album) can be used.
Another formula: Peel Nanmu (Phoebe zhennan) and Tongmu (Vernicia fordii) wood, boil to obtain juice for soaking, and drink a small amount, following the method of Xiaodou (Vigna angularis). (From Volume 1)
Fan Wang formula treats Edema starting from the feet, which becomes fatal if it spreads upward into the abdomen, using Zhu Gan (Porcine Liver) formula.
One fresh pig liver, cooked according to dietary methods, finely chopped, and eaten all at once. Do not use salt; vinegar may be used. For pigs weighing 50-60 jin or more, consume the liver in one sitting. For pigs weighing over 100 jin, divide into two doses. (Same as Zhouhou Beiji Fang)
Another formula for swelling limited to both feet.
Chopped Congye (Allii Fistulosi Folium) boiled until soft, used for soaking, 3-4 times daily, yields good results. (Same as Jiyan Fang, From Volume 28)