火泻，完谷不化，饮食下喉即吐，日夜有泄数十次，甚至百次者，人皆知其热也。然而热之生也，何故？生
于肾中之水衰，不能制火，使胃土关门不能守于上下，所以直进而直出也。论其势之急迫，似乎宜治其标。然治其
标，而不能使火之骤降，必须急补肾中之水，使火有可居之地，而后不至于上腾，方用∶
熟地（三两） 山萸（一两） 白芍（三两） 茯苓（一两） 车前子（一两） 甘草（一两） 肉桂（三分）
水煎服。
此方乃补肾之药，非止泻之品，然而止泻之妙，捷如桴鼓。〔盖肾水一生，肾火即降，顷刻应验，非好为奇
谈，而乃据实理也。若正作胃虚有火治之，未尝无功，不若此方之捷也。〕
有一日泻五、六十行者，倾肠而出，完谷不化，粪门肿痛，如火之热，苟无以救之，必致立亡。方用截泻汤∶
薏仁（二两） 白芍（二两） 山药（一两） 车前子（一两） 茯苓（五钱） 泽膝（二钱） 黄连（五钱）
人参（三钱） 甘草（二钱） 肉桂（三分）
水煎服。
水泻，〔乃脾气不温，〕方用∶
白术（一两） 车前子（五钱）
水煎服。
此方补肾健脾，利水去湿，治泻神效。〔白术、车前子，利腰脐而消水气。然而白术亦能健脾，脾健水湿自能
分消，不必借重车前子。车前子能通窍而安脏气，亦不止分消水湿巳也。脏安则水湿之气自消，各有专能，又能分
助，所以奏功如神耳。〕
Fire diarrhea (Huo Xie), characterized by undigested food in the stool, vomiting immediately after swallowing food, and defecating dozens or even hundreds of times a day and night, is generally known to be a heat syndrome. However, what is the cause of this heat? It arises from the deficiency of water (Yin) in the Kidney, which fails to control fire (Yang). This causes the "gate" function of the Stomach Earth (Spleen and Stomach) to fail in guarding the upper and lower openings, resulting in food passing directly through. Given the urgency of the condition, it might seem appropriate to treat the branch (symptoms). However, treating only the branch without rapidly descending the fire requires urgently tonifying the water in the Kidney, providing a residence for the fire so that it does not flare upward. The prescription is as follows: Shu Di Huang (Prepared Rehmannia Root, 3 liang), Shan Yu (Cornus Fruit, 1 liang), Bai Shao (White Peony Root, 3 liang), Fu Ling (Poria, 1 liang), Che Qian Zi (Plantago Seed, 1 liang), Gan Cao (Licorice Root, 1 liang), Rou Gui (Cinnamon Bark, 3 fen). Decoct in water and take orally.
This prescription consists of herbs that tonify the Kidney, not specifically anti-diarrheal agents, yet its effect in stopping diarrhea is as swift as a drumbeat. [This is because once Kidney Water is generated, Kidney Fire descends immediately; the effect is instantaneous. This is not merely seeking novelty but is based on true principles. If treated as Stomach deficiency with fire, there may be some efficacy, but it is not as rapid as this prescription.]
In cases where one experiences fifty to sixty episodes of diarrhea per day, with intestinal contents pouring out, undigested food in the stool, painful and swollen anus, and a burning sensation like fire, failure to provide rescue will lead to immediate death. The prescription Jie Xie Tang (Diarrhea-Cutting Decoction) is used: Yi Ren (Coix Seed, 2 liang), Bai Shao (White Peony Root, 2 liang), Shan Yao (Chinese Yam, 1 liang), Che Qian Zi (Plantago Seed, 1 liang), Fu Ling (Poria, 5 qian), Ze Xie (Alisma Rhizome, 2 qian), Huang Lian (Coptis Rhizome, 5 qian), Ren Shen (Ginseng Root, 3 qian), Gan Cao (Licorice Root, 2 qian), Rou Gui (Cinnamon Bark, 3 fen). Decoct in water and take orally.
Water diarrhea (Shui Xie), [caused by the Spleen Qi lacking warmth], is treated with: Bai Zhu (Atractylodes Macrocephala Rhizome, 1 liang), Che Qian Zi (Plantago Seed, 5 qian). Decoct in water and take orally.
This prescription tonifies the Kidney and strengthens the Spleen, promotes urination to remove dampness, and is miraculously effective for treating diarrhea. [Bai Zhu and Che Qian Zi unblock the waist and umbilical region and dissipate water qi. However, Bai Zhu also strengthens the Spleen; when the Spleen is healthy, water and dampness are naturally separated and eliminated, reducing reliance on Che Qian Zi. Che Qian Zi can open orifices and stabilize organ qi, doing more than just dissipating water dampness. When organs are stable, water dampness naturally dissipates. Each herb has its specific function and they assist each other, thus achieving miraculous results.]