黄汗之为病。身体肿兼发热。汗出而渴。其汗沾衣。其色黄如柏汁染者。脉来沉细。此
症因何而得之。人若以汗出时入水而浴。病从毛孔中入得也。
桂酒 治黄汗。
黄 白芍（各一两） 桂枝（三钱）
苦酒半碗。水一碗。煎八分。空心服。
又方
黄柏 黄 （各一钱） 枣仁 人参 牡蛎 黄连 白术（各一钱五分）
水煎不拘时服。
火之为病。其害甚大。其变甚速。其势甚彰。其死甚惨。何者。盖缘燔灼焚焰。飞走狂
越。一动便伤元气偏寒遗害他经内经病机十九条。而属火者五。刘河间推展五运。为病属肝者。
诸风之火。属脾胃者。诸湿痰火。属心肺者。诸实热火属肾者。诸虚之火。散于各经。浮游
之火。入气分。无根之火。入血分。消阴伏火。故曰诸病寻痰火。痰火生异症。要分内外虚
实。外因邪郁经络。积热脏腑。此为有余火。内因饮食情欲。气盛似火。此为有余之中不足
。阴虚火动。乃不足之火。又有大怒之火。起于肝。则手掉目眩。醉饱之火起于胃。则痞塞
肿满。悲哀之火。起于肺。则气郁喘息。房劳之火。起于肾。则骨蒸潮热。气从左边起者肝
火也。气从脐下起者阴火也。热从脚下起至腹者。虚之极也。若壮实之人有此。是湿郁成热
之候也。不可不辨。实火内外皆热。口渴日夜潮热。大小便闭。虚火潮热有间口燥不渴。虚
火可补。实火可泻。轻者可降。重者从其性而升之。君火正治。可以湿伏。可以水灭。可以
直折相火反治。不可以水湿折。惟从其性而伏之。即如实火发狂。宜三黄汤治。虚火发狂。
先与姜汤。然后补阴。其火自降。凡火盛不可猛用凉药。必酒炒过。或兼温散。能缓急。火
不妄动。动由于心。静之一字。其心中之水乎。
黄汗这种病，表现为身体浮肿并伴有发热，出汗且感到口渴，汗水沾染衣物，颜色像柏树汁液染过一样黄，脉象沉细。这种病症是如何得来的呢？是因为人在出汗时进入水中沐浴，病邪从毛孔侵入所致。
桂酒方：治疗黄汗。
药材：黄芪、白芍（各一两），桂枝（三钱）。
用法：用半碗醋、一碗水，煎煮至剩余八分量的药液，空腹服用。
另一个方子：
药材：黄柏、黄芪（各一钱），酸枣仁、人参、牡蛎、黄连、白术（各一钱五分）。
用法：用水煎煮，不拘泥于固定时间服用。
火邪致病，其危害极大，变化迅速，症状显著，致死惨烈。为什么呢？因为火焰燃烧焚烧，蔓延狂越，一旦发动就会损伤元气，甚至遗留寒邪祸害其他经络。《内经·病机十九条》中，归属于火的病证有五条。刘河间推演五运六气理论，指出：属于肝的，是各种风邪化火；属于脾胃的，是各种湿邪、痰浊化火；属于心肺的，是各种实热之火；属于肾的，是各种虚火。这些火散在于各条经络，如浮游之火，进入气分的称为无根之火，进入血分的称为消阴伏火。所以说“各种疾病多寻痰火”，痰火会产生奇异病症，必须分辨内外虚实。外因导致的，是邪气郁结在经络，积热在脏腑，这属于有余之火（实证）；内因导致的，是由于饮食不节或情欲过度，气盛似火，这属于“有余之中不足”（本虚标实）；阴虚导致的火动，属于不足之火（虚证）。又有大怒引起的火，起于肝，则出现手足抖动、目眩；醉饱后引起的火，起于胃，则出现痞塞、肿胀满闷；悲哀引起的火，起于肺，则出现气郁、喘息；房劳过度的火，起于肾，则出现骨蒸潮热。气从身体左侧升起的，是肝火；气从脐下升起的，是阴火；热气从脚底升起直至腹部的，是虚损到了极点。如果是壮实之人出现这种情况，则是湿邪郁结化热的征候，不可不仔细辨别。实火表现为内外皆热，口渴，日夜潮热，大小便闭塞；虚火表现为潮热有时缓解，口燥但不渴。虚火可以用补法，实火可以用泻法。轻症可以降火，重症则顺应其性质而升散之。君火采用正治法，可以用湿法潜降，用水熄灭，直接折服；相火采用反治法，不可以用水湿强行折服，只能顺应其性质使其潜伏。就像实火导致发狂，适宜用三黄汤治疗；虚火导致发狂，先给予姜汤，然后滋阴，火势自然下降。凡是火盛，不可猛烈使用凉药，必须经过酒炒，或者兼用温散药物，能够缓和急迫，火就不会妄动。火的发动源于心，“静”这个字，就是心中的水啊。
Yellow Sweat Disease (Huanghan) presents with body swelling accompanied by fever, sweating with thirst. The sweat stains the clothing and is yellow in color, resembling dye made from cypress juice. The pulse is deep and fine. How is this condition acquired? It occurs when a person bathes in water while sweating, allowing pathogenic factors to enter through the pores.
Gui Jiu Decoction (Cinnamon Wine Decoction): Treats Yellow Sweat Disease.
Ingredients: Huangqi (Astragali Radix), Baishao (Paeoniae Radix Alba) (each 1 liang), Guizhi (Cinnamomi Ramulus) (3 qian).
Preparation and Administration: Use half a bowl of Kujiu (Vinegar) and one bowl of water. Decoct until eight-tenths of the liquid remains. Take on an empty stomach.
Another Prescription:
Ingredients: Huangbai (Phellodendri Cortex), Huangqi (Astragali Radix) (each 1 qian); Zaoren (Ziziphi Spinosae Semen), Renshen (Ginseng Radix et Rhizoma), Muli (Ostreae Concha), Huanglian (Coptidis Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma) (each 1.5 qian).
Preparation and Administration: Decoct in water and take at any time without restriction.
Pathogenic Fire causes severe harm, rapid changes, prominent symptoms, and tragic death. Why? Because fire burns and spreads wildly; once activated, it damages Yuan Qi (Original Qi) and may leave behind cold pathogens that harm other meridians. In the "Nineteen Pathogenesis Categories" of the *Neijing* (*Inner Canon*), five categories are attributed to Fire. Liu Hejian expanded upon the theory of Five Movements and Six Qi, stating: Those belonging to the Liver are Wind-Fire; those belonging to the Spleen and Stomach are Dampness-Phlegm-Fire; those belonging to the Heart and Lungs are Excess Heat-Fire; those belonging to the Kidney are Deficiency Fire. These fires scatter among various meridians. Floating Fire entering the Qi Level is called Rootless Fire; entering the Blood Level is called Yin-Dissipating Hidden Fire. Thus, it is said that "various diseases seek Phlegm-Fire," and Phlegm-Fire generates abnormal symptoms. One must distinguish between interior/exterior and deficiency/excess. Exterior causes involve pathogenic stagnation in meridians and accumulated heat in organs, constituting Excess Fire (Shi Huo). Interior causes involve dietary indiscretion or excessive desire, where Qi abundance mimics fire, representing "Excess within Deficiency." Yin Deficiency leading to Fire movement constitutes Deficient Fire. Additionally, anger-induced Fire originates in the Liver, causing tremors and dizziness; fire from overeating/drinking originates in the Stomach, causing distension and fullness; sorrow-induced Fire originates in the Lungs, causing Qi stagnation and panting; sexual exhaustion-induced Fire originates in the Kidneys, causing bone-steaming tidal fever. Qi rising from the left side indicates Liver Fire; Qi rising from below the umbilicus indicates Yin Fire. Heat rising from the feet to the abdomen indicates extreme deficiency. If robust individuals exhibit this, it is a sign of Heat generated from Dampness stagnation, which must be carefully distinguished. Excess Fire presents with heat inside and out, thirst, tidal fever day and night, and constipation/urinary retention. Deficient Fire presents with intermittent tidal fever, dry mouth but no thirst. Deficient Fire is treated by tonification; Excess Fire is treated by purgation. Mild cases can be descended; severe cases should be dispersed by following their nature. Ministerial Fire (Jun Huo) is treated directly: it can be subdued by dampness, extinguished by water, or broken down directly. Adjuvant Fire (Xiang Huo) is treated inversely: it cannot be broken down by water/dampness but must be subdued by following its nature. For example, Excess Fire causing mania is treated with Sanhuang Tang (Three Yellows Decoction); Deficient Fire causing mania is first treated with Ginger Decoction, followed by Yin tonification, after which the Fire subsides. When Fire is abundant, cold medicines must not be used aggressively; they should be stir-fried with wine or combined with warm-dispersing agents to relieve urgency, preventing Fire from moving recklessly. Fire movement stems from the Heart. The character "Stillness" (Jing) represents the Water of the Heart.