血未有不红者，何以名“白血”？不知久病之人，吐痰皆白沫，乃白血也。白沫何以名白血？以其状似蟹涎，无
败痰存其中，实血而非痰也。若将所吐沫，露于星光之下，一夜必变红矣。此沫出于肾，而肾火沸腾于咽喉，不
得不吐之者也。虽是白沫，而实肾中之精，岂特血而已哉？苟不速治，则白沫变为绿痰，无可如何矣。方用∶
熟地（一两） 山萸（五钱） 山药（五钱） 丹皮（二钱） 茯苓（五钱） 泽泻（二钱） 麦冬（一两） 五
味子（一钱）
水煎服，日日服之。
丹皮（七分炒黑） 栀子（五分炒黑） 真蒲黄（一钱二分，炒黑） 川芎（一钱，酒洗）
生地（一钱，酒洗） 贝母（一钱） 陈皮（七分）
水二樽，童便、藕汁各半樽，煎服。此方治吐血，神效无比，二剂止。
吐血不止，救急方用∶
青柏叶（一把） 干姜（三片） 阿胶（一挺）
共三味，水二碗，煎一碗服。
又方∶
就用吐出血块，炒黑为末，每服三人，以麦冬汤调服。
又方∶
以古金墨磨汁，同萝卜汁饮之。
又方∶
痰带血丝，童便、竹沥止之。（《男科》中无）
又方∶
茜草根末二、三钱，童便煎服。
又方∶
吐血不止，藕汁加童便良。
又方∶
大苏叶根，捣汁温服。
血液没有不是红色的，为什么称为“白血”？不知道久病的人，吐出的痰都是白色泡沫，这就是所谓的“白血”。白色的泡沫为什么被称为“白血”？因为它的形状像螃蟹的唾液，其中没有腐败的痰液，实际上是血而不是痰。如果把所吐出的泡沫，暴露在星光下，一夜之后一定会变成红色。这种泡沫产生于肾，而肾火在咽喉处沸腾，不得不将其吐出。虽然是白色泡沫，但实际上是肾中的精气，哪里仅仅是血而已呢？如果不迅速治疗，那么白沫会变成绿色的痰，那就无可奈何了。方剂用：熟地黄（一两）、山茱萸（五钱）、山药（五钱）、牡丹皮（二钱）、茯苓（五钱）、泽泻（二钱）、麦冬（一两）、五味子（一钱）。用水煎服，每天服用。
牡丹皮（七分炒黑）、栀子（五分炒黑）、真蒲黄（一钱二分，炒黑）、川芎（一钱，酒洗）、生地黄（一钱，酒洗）、贝母（一钱）、陈皮（七分）。水两杯，童便、藕汁各半杯，煎服。此方治疗吐血，效果神奇无比，服用两剂即可止血。
吐血不止，急救方用：侧柏叶（一把）、干姜（三片）、阿胶（一块）。共三味药，水两碗，煎成一碗服用。另一个方子：就用吐出的血块，炒黑研为粉末，每次服用三钱，用麦冬汤调服。又一个方子：用古法金墨磨成汁，同萝卜汁一起饮用。又一个方子：痰中带血丝，用童便、竹沥止住。（《男科》中无此条）又一个方子：茜草根末二、三钱，用童便煎服。又一个方子：吐血不止，藕汁加童便效果好。又一个方子：紫苏根，捣汁温服。
Blood is never without redness; why is it named "white blood"? It is unknown that in patients with chronic illness, the expectorated phlegm consists entirely of white froth, which is termed "white blood." Why is white froth called "white blood"? Because its appearance resembles crab saliva, containing no putrid phlegm, but is actually blood rather than phlegm. If the expectorated froth is exposed under starlight overnight, it will inevitably turn red. This froth originates from the Kidney (Shen), where Kidney Fire (Shen Huo) boils up in the throat, necessitating its expulsion. Although it appears as white froth, it is essentially the essence (Jing) of the Kidney, not merely blood. If not treated promptly, the white froth will transform into green phlegm, at which point nothing can be done. The prescription is as follows: Prepared Rehmannia Root (Shu Di Huang, 1 liang), Cornus Fruit (Shan Yu, 5 qian), Chinese Yam (Shan Yao, 5 qian), Moutan Cortex (Dan Pi, 2 qian), Poria (Fu Ling, 5 qian), Alisma Rhizome (Ze Xie, 2 qian), Ophiopogon Tuber (Mai Dong, 1 liang), Schisandra Berry (Wu Wei Zi, 1 qian). Decoct in water and take orally, daily.
Moutan Cortex (Dan Pi, 0.7 fen, stir-fried until black), Gardenia Fruit (Zhi Zi, 0.5 fen, stir-fried until black), True Polygonum Cattleyanum Seed (Pu Huang, 1.2 qian, stir-fried until black), Szechuan Lovage Rhizome (Chuan Xiong, 1 qian, washed with wine), Rehmannia Root (Sheng Di Huang, 1 qian, washed with wine), Fritillaria Bulb (Bei Mu, 1 qian), Tangerine Peel (Chen Pi, 0.7 fen). Use two cups of water, half a cup of child's urine (Tong Bian), and half a cup of lotus root juice (Ou Zhi); decoct and take. This formula treats hemoptysis with unparalleled miraculous efficacy, stopping bleeding after two doses.
For unceasing hemoptysis, an emergency rescue formula uses: Houttuynia Herb? No, Biota Tops (Qing Bai Ye, one handful), Dried Ginger (Gan Jiang, three slices), Donkey-Hide Gelatin (E Jiao, one piece). These three ingredients are decocted in two bowls of water until one bowl remains, then taken orally. Another formula: Take the expelled blood clots, stir-fry until black, grind into powder, and take three qian per dose, mixed with Ophiopogon Decoction (Mai Dong Tang). Another formula: Grind ancient gold ink into juice and drink it together with radish juice. Another formula: For phlegm streaked with blood, stop it with child's urine (Tong Bian) and bamboo sap (Zhu Li). (This entry is absent in the *Nanke* text). Another formula: Two to three qian of Rubia Cordifolia Root powder (Qian Cao Gen Mo), decocted with child's urine (Tong Bian) and taken orally. Another formula: For unceasing hemoptysis, lotus root juice (Ou Zhi) added with child's urine (Tong Bian) is beneficial. Another formula: Perilla Root (Da Su Ye Gen), crushed for juice and taken warm.