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[Scriptural Principles]
The Yellow Emperor asked: What is the prognosis for dysentery with bloody stools? Qibo replied: If the body is hot, the prognosis is poor (death); if the body is not hot, the prognosis is good (survival). The Yellow Emperor asked: What is the prognosis for dysentery with white mucus? Qibo replied: If the pulse is deep, the prognosis is good (survival); if the pulse is floating, the prognosis is poor (death).
The Yellow Emperor asked: What is the prognosis for dysentery with pus and blood? Qibo replied: If the pulse is suspended and severed (extremely weak or rootless), the prognosis is poor (death); if the pulse is slippery and large, the prognosis is good (survival). The Yellow Emperor asked: What if the body is not hot and the pulse is not suspended and severed? Qibo replied: A slippery and large pulse indicates survival; a suspended and choppy pulse indicates death. One can predict the time of death based on the cycle of the Zang organs. ○ If the Spleen pulse beats outwardly and is deep, it indicates dysentery, which will heal itself after a long time. If the Liver pulse is small and slow, it indicates dysentery, which is easy to treat. If the Kidney pulse is small, bounding, and deep, it indicates dysentery with bloody stools; if the blood is warm and the body is hot, the prognosis is poor (death). ○ Pathologies of the Heart and Liver meridians may also present with bloody stools; if both Zang organs are diseased simultaneously, it is treatable. If the pulse is small, deep, and choppy, indicating dysentery, and the body is hot, the prognosis is poor (death). ○ When both Yin and Yang are deficient, dysentery leads to death. ○ When Kidney heat transfers to the Spleen, transforming into a deficiency syndrome, dysentery leads to death. (From *Su Wen*)

[Philosophical Statements]
Dysentery is classified into red dysentery, white dysentery, red-and-white dysentery, water-and-grain dysentery, pus-and-blood dysentery, Jin Kou dysentery (inability to eat/drink), Xiu Xi dysentery (intermittent/recurrent), Wind dysentery, Cold dysentery, Heat dysentery, Dampness dysentery, Qi dysentery, Deficiency dysentery, Slippery dysentery, Accumulation dysentery, Chronic dysentery, Epidemic dysentery, Worm/Zhu dysentery, and Five-Color dysentery. (From *Dong Yi Bao Jian*)

Commentary: The condition known as "Zhi Xia" (dysentery/stagnant discharge) was historically discussed together with diarrhea by ancient physicians. It was only in the *San Yin Fang* that it was established as a separate category. Diseases acquired from external pathogens require differentiation according to the Six Evils (Wind, Cold, Summerheat, Dampness, Dryness, Fire). Once the exterior is injured and the intestines and stomach become stagnant, treatment must be adjusted according to their cold, heat, warmth, or coolness. Diseases arising from internal organ dysfunction interfering with the intestines and stomach require identifying which Zang organ is involved and treating to restore balance. Diseases caused by dietary irregularities require identifying the specific food injury and using digestion-promoting or purgative methods. However, diseases have excess and deficiency patterns, and treatment has a sequence. If the pathogenic qi arrives suddenly and the Yuan Qi is strong, with stubborn accumulation, purgation is appropriate; if the disease is chronic leading to Qi collapse, with weak and slipping intestines and stomach, warming and astringing are appropriate. Generally, one warms when suitable, purges when suitable, releases the exterior, or promotes urination, distinguishing between interior/exterior locations and combinations with Wind, Heat, or Cold. Pus and blood being red or white distinguishes between Qi-level and Blood-level diseases; tenesmus and abdominal urgency distinguish between Qi/Blood excess/deficiency, which must be carefully observed. (Liu Zongnong)

Treatment methods for dysentery: For exterior conditions, use sweating; for interior conditions, use purging; for upper conditions, use emesis; for lower conditions, use draining or securing; for surface heat, use dispersing; for difficult urination, use promoting diuresis; for excess conditions, use harmonizing to remove the pathogen; for depletion, use astringing. (Zhang Jiegou)

In treating dysentery, harmonize the Blood without damaging it, and regulate the Qi without breaking it. (*Ren Zhai Zhi Zhi Fang*)

Tenesmus (heavy sensation in the rectum) is suitable for purging; abdominal pain is suitable for harmonizing; heavy body requires removing dampness; wiry pulse requires dispelling wind; internal binding of Wind evil requires sweating; cold body with spontaneous sweating requires warming; thick and sticky pus and blood require heavy doses to drain them. (Liu Hejian)

Liu Hejian elucidated the syndrome and treatment of "Zhi Xia" (dysentery), which is particularly crucial. Harmonizing the Blood makes pus in stool heal spontaneously; regulating the Qi removes tenesmus spontaneously. These two statements are like the sun and moon for the blind, and thunder for the deaf. ○ Someone asked: Liu Hejian's discussion on dysentery seems to lack mention of combined deficiency or cold. I reply: In diarrhea and loose stools, food and water may or may not digest, but there is no tenesmus. Dysentery is different; it presents with pus, blood, intestinal mucus, or undigested matter. Whether painful or not, all feature tenesmus and distress, belonging to Excess-Heat syndromes. In recent clinical experience, there are also Deficiency-Cold cases, such as treating my cousin Lou Changguan, using Ginseng, Atractylodes, and dried Ginger. (Zhu Danxi)

Liu Hejian stated: To treat various dysenteries, nothing is better than bitter, pungent, and cold herbs. Bitterness dries dampness, cold overcomes heat, thereby making the Qi flow smoothly. This theory has been passed down, causing all dysentery treatments to use cold-cooling herbs, which is a mistake derived from this theory. Let us analyze just the phrase "bitterness dries dampness" to see its great flaw. The principles of the five flavors come from the *Nei Jing*. It says "use bitterness to dry," referring to the drying nature of bitterness. Liu Hejian failed to observe this, assuming all bitter herbs dry dampness. He did not know that the *Nei Jing* states bitterness has two natures and six functions. For example: Fire generates bitterness. Its class is Fire, its flavor is bitter. Shaoyang in the泉 position transforms into bitterness; Shaoyin in the quan position transforms into bitterness. Dampness overflowing internally is treated with bitter-hot; Dryness overflowing internally is treated with bitter-warm. These refer to the Yang aspect of bitterness. Sour and bitter inducing vomiting and purging are Yin. Dampness ruling the earth with counteracting Heat is treated with bitter-cold. Dampness transforming from heaven with counteracting Heat is treated with bitter-cold. These refer to the Yin aspect of bitterness. Thus, two natures. Also: Use bitterness to disperse, dry, warm, firm, drain, and purge. These are the six functions. Bitter-dispersing includes Ephedrae Herba (Mahuang), Angelicae Dahuricae Radix (Baizhi), Bupleuri Radix (Chaihu), and Cimicifugae Rhizoma (Shengma). Bitter-drying includes Atractylodis Macrocephalae Rhizoma (Cangzhu), Atractylodis Rhizoma (Baizhu), Aucklandiae Radix (Muxiang), and Psoraleae Fructus (Buguzhi). Bitter-warming includes Aconiti Lateralis Radix Praeparata (Fuzi), Zingiberis Rhizoma (Ganjiang), Cinnamomi Cortex (Rougui), and Evodiae Fructus (Wuyu). Bitter-firming includes Dipsaci Radix (Xuduan), Sanguisorbae Radix (Diyu), and Terminalia Chebulae Fructus (Hezi). Bitter-draining includes Gardeniae Fructus (Zhizi), Phellodendri Cortex (Huangbai), Scutellariae Radix (Huangqin), Coptidis Rhizoma (Huanglian), Akebiae Caulis (Mutong), and Gentianae Radix (Longdancao). Bitter-purging includes Rhei Radix et Rhizoma (Dahuang) and Natrii Sulfas (Mangxiao). The way of Qi transformation is that only Yang dries, and only Yin moistens. How can sinking, descending herbs like Coptidis Rhizoma (Huanglian) and Phellodendri Cortex (Huangbai), which are extremely bitter and cold, be said to dry dampness? Is this logical? They only know "bitter dries" and ignore the other five functions: bitter-dispersing, bitter-warming, bitter-firming, bitter-draining, and bitter-purging! This causes later generations to treat dysentery without distinguishing cold/heat or excess/deficiency, blindly applying Liu Hejian's method. By the time patients are critical, they say, "The blood looks like this, how dare I use warming?" "The abdomen hurts like this, how dare I use tonification?" Dying without awakening is deeply lamentable! (*Jing Quan Shu*)

In treating dysentery, if exterior symptoms appear, release the exterior first. If the exterior is not resolved, the pathogen will transmit inward, making cure difficult. Thus, fever and body ache indicate pathogen in Taiyang; use Shen Su Yin. Alternating chills and fever indicate pathogen in Shaoyang; use Xiao Chai Hu Tang. Fever, eye pain, dry nose, and insomnia indicate pathogen in Yangming; use Gegen Tang. Only after resolving exterior pathogens is there no risk of transmission. (Cha Liaowu)

The *Nei Jing* mentions that winter cold damage already involves heat. By summer and autumn, Heat, Summerheat, and Dampness steam and mix, creating heat ten times greater than in winter. Lower dysentery caused by external Heat, Summerheat, and Dampness must first be resolved via sweating from the exterior, then the interior regulated. First use acrid-cool herbs to release the exterior, then bitter-cold herbs to clear the interior. If exterior release is missed, the external pathogen can only exit from the interior, refusing to cease until death. Therefore, even for chronic dysentery lasting a hundred days, one should still use the "Rowing Upstream Against the Current" (Ni Liu Wan Zhou) method to guide the pathogen out through the exterior, turning death into life and danger into safety. The *Jin Gui Yao Lue* states: Dysentery with a wiry pulse, fever, and sweating will heal spontaneously. The pulse of chronic dysentery has entered the Yin level, becoming deep, choppy, and weak. A sudden shift to a wiry pulse indicates the generating Qi of Shaoyang. Without the reverse-warding method, how could this occur? Chronic dysentery with pathogen in Yin usually lacks fever. Now, due to the reverse-warding momentum, temporary dry heat is forced out; soon the pathogen exits via the exterior, and the heat disappears. Chronic dysentery causes Yang Qi to sink, skin becomes dry, and sweating is impossible. The reverse-warding method leads the defensive Yang and pathogen back to the exterior to sweat, calming the abdomen and healing the disease. However, sudden exposure to Summerheat-Dampness toxin causing massive watery diarrhea (70-80 times/day) with extreme thirst indicates intestinal rotting from heat toxin. Using the reverse-warding method here is too slow and inappropriate. Instead, follow the *Nei Jing*'s "Treat obstruction with unblocking" (Tong Yin Yong Tong) method: use Rhei Radix et Rhizoma (Dahuang), Coptidis Rhizoma (Huanglian), and Glycyrrhizae Radix et Rhizoma (Gancao), administering dozens of cups in a day. Wait for the intense diarrhea and thirst to subside, then regulate the interior. Do not attempt to ward it out externally, as the pathogen flows like bursting water and rolling stones, exhausting itself naturally. Another method is "Urgently Opening Side Channels": Internal heat rushing to the Large Intestine stagnates in the Bladder. Bladder heat stagnation prevents Qi transformation, causing short, red urine. Using reverse-warding instead of guiding downward is ineffective. Clearing Bladder heat allows Qi transformation and dissipates heat quickly. Zhang Zhongjing said for dysentery with Qi disturbance, promote urination. Isn't this opening side channels? Water originates from the Lung source. If the Lung is not hot, urination proceeds normally. Lung and Large Intestine are exterior-interior pairs; Large Intestine heat often stems from Lung heat transfer, so clearing the Lung source is priority. The *Jin Gui* mentions dysentery with lung pain, treated with Zi Shen Tang; Qi dysentery, treated with Helile San. Later generations doubted these were not Zhang Zhongjing's formulas, failing to realize that intestinal diseases relate entirely to the Lung. When Lung Qi is blocked causing pain, urgently unblock the congestion; when Large Intestine Qi sinks causing pressure, slowly regulate comfort. ○ Further note: Treating malaria should advance and retreat via Shaoyang. Similarly, the exterior aspect of dysentery should use the Shaoyang half-exterior/half-interior method to slowly reverse-ward the sinking clear Qi, allowing the body to maintain Spring-Summer generating functions rather than contracting. Ultimately, this is a harmonizing method, not sweating. If fluids are intact, sweating is harmless; if fluids are damaged, slight moisture suffices to lift sinking Qi. This is not comparable to Taiyang exterior Wind-Cold requiring strong sweating, nor Taiyang-Yangming combined disease dysentery using Gegen Tang. Ah! Subtle indeed. (Yu Jiayan)

Dysentery, anciently named "Zhi Xia," is mostly caused by Summerheat-Dampness with accumulation in summer/autumn, followed by Wind, Fire, and Cold; Dryness alone does not cause it. Summerheat has Yin and Yang aspects, always involving Dampness. Yin Summerheat arises from pre-existing Yang deficiency plus cold indulgence, suppressing Yang generation, thus treated with warming. Yang Summerheat arises from heavenly heat obstructing Qi transformation, thus treated with cooling. Pathogens enter like flowing water, lodging where organs have gaps, affecting Qi or Blood, Zang or Fu. If exterior pathogen stagnates causing continuous downward Qi flow, Yu's Ren Shen Bai Du San applies. If internal accumulation binds with mixed cold/heat, Jiegou's Shao Yao Tang applies. In the Qi level, use bitter-pungent Qi regulation or acrid-sweet Qi tonification. In the Blood level, use sour-bitter Blood moving or salty-soft Blood nourishing. If exterior symptoms are urgent, involve the Three Yangs: Guizhi Tang, Gegen Qinlian Tang, Xiao Chai Hu Tang. If interior excess is solid, focus on Spleen/Stomach: Xiao Chengqi Tang, Wen Pi Tang. In summary, treat Fu organs based on Sanjiao manifestations, treat Zang organs focusing on the Three Foot Yin meridians, differentiate excess/deficiency, and choose unblocking/astringing methods. The hardest to cure is Xiu Xi dysentery (recurrent), requiring varied attack/tonify methods. The most dangerous is Jin Kou dysentery (inability to eat), having two types: If Summerheat-Dampness blocks the Sanjiao, Qi reverses and closes, separating upper and lower. Poor treatment leaves no path for pathogens, destroying Zheng Qi. Danxi's legislation is supreme, followed by later generations. The author borrows Ban Xia Xie Xin Tang, removing stabilizing herbs, using tonification to move, pungency to open, bitterness to descend. If Spleen/Kidney Yang is deficient, Yin evil descends, injuring Taiyin then Shaoyin, opening gates wide with painful diarrhea. Spleen/Stomach fire mechanism is weak, Mingmen steaming power is lost, causing anorexia, vomiting, distension. This differs from excess heat/toxin. Reference Zhang Zhongjing's Lizhong Tang, Shenqi Wan, Jingyue's Liyin Jian, Weiguan Jian. Add large doses of Cistanche Herba (Rongsu) with Ginseng, Angelicae Sinensis Radix (Danggui), Ginger, Aconite, Cinnamon, processed White Peony. This surpasses Rehmannia and Donkey-hide Gelatin for exhausted intestinal essence and knotted collaterals. ○ Ancient sages treated dysentery with only unblocking or astringing: new dysentery needs unblocking, chronic needs astringing. ○ "Zhi" (stagnation) in Zhi Xia does not mean food stagnation, but Summerheat-Dampness invading and blocking intestinal circulation. (*Lin Zheng Zhi Nan*)

Wang Sun'an attributed all dysenteries to Damp-Heat entering the Stomach. This single sentence reveals the pathology. Dysentery abdominal pain occurs below the umbilicus, in the Small Intestine region. If the Small Intestine is free of toxin, waste follows the normal path, curving down without obstruction. Pus and blood cannot follow the normal path and refuse to pass, causing pain. Difficult urination occurs because the Small Intestine is pressured by toxic pathogens, unable to separate and diffuse, leading to scant urine. Jin Kou dysentery occurs when toxin vapors are excessive or medicines are too harsh, injuring the Zong Qi of the Upper/Middle Jiao, allowing toxic pathogens to reverse upward. (*Ji Ren Bian*)

General rules for treating dysentery: Initially push away (purge), later warm and tonify, but primarily protect Stomach Qi. All diseases depend on Stomach Qi, especially dysentery. Those who can eat are mild; those who cannot eat are severe; those who absolutely cannot eat die. Dysentery relies heavily on Stomach Qi. ○ Diarrhea and dysentery are distinct; mixing them and treating Damp-Heat by promoting urination is incorrect. Diaphoretic/drainage herbs promote water flow; if turbid flow clears, diarrhea stops. But dysentery involves foul matter formed by Damp-Heat stagnating in intestines, exiting via Large Intestine transmission. Overusing drainage herbs exhausts Yang and dries fluids, compounding the downward trend of disease and medicine. ○ Treating Zhi Xia differs from Slippery Diarrhea. Slippery diarrhea can be astringed (using Poppy Shell, Chebula); Zhi Xia is inherently Damp-Heat stagnation, requiring draining/unblocking, strictly avoiding astringents. Large Intestine is the Fu organ of the Lung. If Large Intestine has Damp-Heat stagnation, Lung Qi must also be stagnant. Ancients used herbs to benefit Lung Qi, knowing it prefers free flow, clearing Zang to benefit Fu. Mistaken astringing traps Damp-Heat, prevents Lung Qi descent, worsening dysentery and potentially causing Lung invasion with distension, Qi reversal, insomnia, and anorexia. (*Feng Shi Jin Nang*)

Ancients used descending/purgative herbs for dysentery, following "Treat obstruction with unblocking." The method is sound, but efficacy is split. Ineffective cases become chronic or lead to vomiting/refusal to eat (failure syndrome). Reflecting on this, I realized Fire rises; why does it descend to intestines causing dysentery? Due to accumulated heat in the middle, closed by Wind-Cold or suppressed by raw/cold foods, preventing Qi expansion, forcing it downward. Physicians using descending herbs make it worse. Thus, I formulated Zhi Li San for early dysentery: Gegen Tang (Puerariae Radix) as Sovereign to boost Stomach Qi upward; Chen Cha (Aged Tea), Kushen (Sophorae Flavescentis Radix) as Ministers to clear Damp-Heat; Maiya (Hordei Fructus Germinatus), Shanzha (Crataegi Fructus) as Assistants to digest old accumulation; Chi Shao (Paeoniae Radix Rubra), Guangpi (Citri Reticulatae Pericarpium) as Envoys: "Move Blood, pus heals; Regulate Qi, tenesmus resolves." For abdominal fullness/rejection of pressure (old food accumulation), add Puhuang Wan to purge. For chronic Spleen deficiency with little food/much dysentery, use Wuwei Yigong San + Baishao, Xianglian to clear and tonify. For Qi sinking, use Buzhong Yiqi Tang to lift. For heat/toxicity blocking Stomach with vomiting, use Kaijin San to open. For chronic dysentery turning Deficiency-Cold with cold limbs/thready pulse, use Fuzi Lizhong Tang + Rougui to warm. (Cheng Zhongling)

Dysentery roots in Spleen and Kidney. Spleen stores grain, Earth is mother of all; Kidney stores essence, Water is origin of all. Both are fundamental. Misdiagnosis leads to tragedy. Errors stem from unclear Cold/Heat and unverified Excess/Deficiency. Recent physicians vary, but even ancients had biases: *Ju Fang* and Fu An used acrid-hot; Hejian and Danxi used bitter-cold. How rigid and divergent! Dysentery arises in Summer/Autumn from Heaven's Damp-Heat steaming; humans exacerbate by seeking coolness/eating raw/cold. Strong constitutions injured by Heaven have much郁热 (stagnant heat); weak constitutions injured by humans have much Yin Cold. Wet Earth exists in all seasons. Following Fire yields Yang Earth excess (Damp-Heat, "Dunfu"); following Water yields Yin Earth deficiency (Cold-Damp, "Beijian"). Emphasizing heat ignores cold; emphasizing cold ignores heat. Claiming Red=Heat, White=Cold is inaccurate. If so, mixed red/white implies simultaneous Cold/Heat? Must differentiate by symptoms and pulse-color. Know: Cold implies Deficiency, Heat implies Excess. Detail Excess/Deficiency to clarify Cold/Heat. Distension, aversion to food, acute pain fearing pressure = Excess. Restlessness/thirst, preference for cold/fear of heat = Heat. Strong/solid pulse = Excess. Rapid/slipping pulse = Heat. Otherwise, it is Deficiency-Cold. Similarities require care. Thirst suggests Excess-Heat, but diarrhea/dysentery loses fluids, drying upper Jiao, causing thirst. Differentiate by preference for hot/cold. Abdominal pain suggests Excess-Heat, but dysentery injures Zang/intestines, peeling flesh, causing pain. Differentiate by pain severity, pressure tolerance, Zang/Yin-Yang, abdominal distension, pulse strength. Dark/scanty urine suggests Excess-Heat, but fluid loss reduces urine volume/color change. Differentiate by urine temperature, fluid status, color luster. Tenesmus suggests Excess-Heat, but Qi sinking fails to store, Yin loss fails to secure gates. Differentiate by disease duration, constitution strength, pulse vigor. Treatment: Identify pathogen and affected Zang. Remove Damp-Heat or accumulation. Regulate Qi, harmonize Blood. New Excess can use "Treat obstruction with unblocking"; Chronic Deficiency can use "Treat blockage with sealing." Strange that 9/10 dysentery patients are Deficient, yet doctors rarely tonify. Qi is already sinking; moving Qi worsens tenesmus. Middle is already weak; attacking accumulation exhausts Yuan Qi. Damp-Heat injuring Blood needs harmonizing; over-purging damages Blood. Fluid loss causing thirst needs stopping diarrhea; promoting urination consumes fluids. Quacks stick to "No tonification for pain," not knowing deficiency pain worsens with attack. List indications for tonification: Weak pulse, deficient appearance, post-fever dysentery, aggravated by attack—all need tonification. Crucially, focus on Spleen/Kidney. Diarrhea followed by dysentery: Spleen transmits to Kidney, "Thief Evil," hard to treat. Dysentery followed by diarrhea: