Library

Shaoyang governs spring; its qi emerges half outside the ground and remains half within it. Human qi is similar, thus Shaoyang governs the semi-exterior and semi-interior (Ban Biao Ban Li). "Semi-exterior" refers to Taiyang (Greater Yang) which is external; "semi-interior" refers to Taiyin (Greater Yin) which is internal. When pathogenic factors enter this space, yin and yang shift, alternating chills and fever occur, and pathogenic factors contend with healthy qi, mutually resisting advance and retreat. At this stage, the methods of sweating (Han), vomiting (Tu), and purging (Xia) are all contraindicated. Therefore, Xiaochaihu Tang (Minor Bupleurum Decoction) is established as a harmonizing method, applied with modifications based on the condition. However, within the modification rules of Xiaochaihu Tang, there are cases where the mouth is not dry and there is slight heat on the body; in such cases, Guizhi (Cinnamon Twig) is added to induce sweating. There are also cases after purging where there is fullness and slight binding in the chest and hypochondrium, difficulty in urination, thirst without vomiting, sweating only on the head, and alternating chills and fever; in these cases, Chaihu Guizhi Ganjiang Tang (Bupleurum, Cinnamon Twig and Dried Ginger Decoction) is used to induce sweating. Furthermore, if Chaihu syndrome (Bupleurum Syndrome) is present but purging is mistakenly applied, resulting in fullness and hard pain below the heart, this is Jie Xiong (Chest Binding), treated with Da Xiexiong Tang (Major Cathartic Pill for the Chest). If Chaihu syndrome persists, Xiaochaihu Tang is given first. If vomiting is incessant, there is urgency below the heart, and mild depression/irritability, the disease has not resolved; Da Chaihu Tang (Major Minor Bupleurum Decoction) is used for purging. Additionally, if the original condition was Chaihu syndrome, but the physician mistakenly used pill-based purgatives causing mild diarrhea, leading to fullness in the chest and hypochondrium, vomiting, and tidal fever in the late afternoon, Xiaochaihu Tang plus Mangxiao (Natrii Sulfas) is used for purging. This shows that Zhang Zhongjing also employed sweating and purging methods, but they depend on detailed clinical observation and treatment tailored to the disease; one must not adhere rigidly to a single approach.

The hallmark symptoms of Shaoyang disease are: bitter taste in the mouth, dry throat, and vertigo/dizziness.

[Annotation] Shaoyang corresponds to the Gallbladder Meridian (Dan Jing). Its vessel originates at the outer canthus, enters the ear from behind the ear, passes through the pharynx, and emerges at the jaw. Pathogenic damage to this meridian causes bitter taste, dry throat, and vertigo. Bitter taste results from heat steaming gallbladder qi upward; dry throat results from heat consuming body fluids; vertigo results from heat steaming the eyes causing visual disturbance. This outlines the general guideline for Wind-Stroke (Zhong Feng) and Cold Damage (Shang Han) pathogens transmitting to Shaoyang. Any mention of Shaoyang Wind-Stroke or Shaoyang Cold Damage in this chapter implies the presence of these symptoms.

[Collected Annotations] Lin Lan stated: The Treatise mentions Shaoyang disease with symptoms like hypochondriac pain, deafness, alternating chills and fever, irritability, frequent vomiting, and hypochondriac stiffness, detailing the semi-exterior semi-interior syndromes thoroughly. Why then does it say bitter taste, dry throat, and vertigo? Generally, for diseases in the meridians, other clauses in this chapter have already covered them; however, if the Gallbladder Fu organ itself is diseased, these symptoms must necessarily appear.

Shen Mingzong stated: Although this is the general syndrome of Shaoyang, it leans towards the interior. Shaoyang governs the Gallbladder, whose vessels circulate along the hypochondrium and connect to the ears, hence hypochondriac pain and deafness. Zhang Zhongjing employs a different perspective to supplement the interior symptoms of bitter taste, dry throat, and vertigo, encompassing Wind damaging Wei (Defensive Qi), Cold damaging Ying (Nutritive Qi), and both Wind and Cold affecting both.

Wu Renju stated: Shaoyang is the Single Yang. Above Shaoyang, Ministerial Fire (Xiang Huo) dominates. If transforming into fire, excessive fire causes dryness, hence bitter taste and dry throat. Shaoyang belongs to Wood, Wood governs the Liver, and the Liver governs the eyes; thus, when diseased, vertigo occurs.

Wei Litong stated: The Gallbladder Fu and Shaoyang Meridian are exterior-interior counterparts, not referring to semi-exterior semi-interior. Semi-exterior is relative to Taiyang's complete exterior; semi-interior is relative to Taiyin's complete interior. Thus, Shaoyang is between semi-exterior and semi-interior, always discussed in terms of meridian boundaries. He further said: What the text means by "not necessarily all present" refers to accompanying symptoms; the main diseases of the Shaoyang meridian and Gallbladder Fu cannot be diagnosed as Shaoyang disease without these primary manifestations being fully present.

Shaoyang Wind-Stroke presents with bilateral hearing loss, red eyes, chest fullness with irritability. Vomiting and purging are contraindicated; doing so leads to palpitations and fright.

[Annotation] "Shaoyang" refers to the symptoms mentioned in the first clause: bitter taste, dry throat, and vertigo. "Wind-Stroke" indicates this Shaoyang disease originated from Wind-Stroke pathogens. The Shaoyang meridian originates at the outer canthus, enters the ear from behind; its branch meets at the clavicular fossa, descends into the chest, and follows the hypochondrium. Exterior pathogens transmitting to this meridian cause red eyes, deafness, chest fullness, and irritability. However, this is chest fullness and irritability due to semi-exterior semi-interior Shaoyang pathology, distinct from the chest fullness and irritability caused by pathogens sinking into the chest in complete Taiyang syndromes. Therefore, vomiting and purging are contraindicated. If performed, they hollow out the middle jiao, leading to deficient spirit and timidity, resulting in palpitations and fright. This outlines the general principle of Wind-Stroke pathogens transmitting to Shaoyang.

[Collected Annotations] Cheng Zhi stated: Shaoyang should only be harmonized. Vomiting depletes Yang, causing palpitations; purging depletes Yin, causing fright.

Wang Hu stated: Shaoyang has contraindications for vomiting and purging precisely because of irritability and fullness, leading to their misuse. Cheng Wuji annotated: Vomiting injures Qi; Qi deficiency causes palpitations. Purging destroys Blood; Blood deficiency causes fright. They did not realize that both fright and palpitations are governed by the Heart. Mistaken vomiting and purging deplete body fluids and weaken the spirit, causing palpitations and fright.

Shen Mingzong stated: Chest irritability and fullness might seem suitable for vomiting, but in Shaoyang, the pathogen has descended to the chest and followed the hypochondrium. Vomiting merely injures Qi in the chest, forcing pathogens inward to oppress the Spirit, leading to palpitations and fright.

Wei Litong stated: This clause discusses Zhang Zhongjing not prescribing a formula. In the Xiaochaihu Tang clause, there are symptoms of heart irritability and epigastric palpitations; one need not seek another formula. Since sweating, vomiting, and purging are contraindicated, harmonization is required. Xiaochaihu Tang is the specific medicine for Shaoyang; its use should be decisive!

Cold Damage presenting with wiry-thin pulse, headache, and fever belongs to Shaoyang. Shaoyang is contraindicated for sweating; sweating leads to delirious speech. This involves the Stomach; if the Stomach harmonizes, recovery occurs; if not, irritability and palpitations ensue.

[Annotation] It says "Cold Damage" rather than "Shaoyang Cold Damage" for brevity, meaning this Shaoyang disease originated from Cold Damage pathogens. A wiry-thin pulse is characteristic of Shaoyang. The previous clause omitted the pulse; this one supplements it. Headache, fever, and anhidrosis are signs of Cold Damage. Combined with Shaoyang signs like bitter taste, dry throat, and vertigo, it is said to belong to Shaoyang. Since Shaoyang disease is already semi-interior, sweating is contraindicated. Sweating further damages fluids and aids heat, inevitably causing delirious speech. Once delirium occurs, the condition transfers to the Stomach. If the person's fluids are naturally sufficient and the Stomach self-regulates, recovery may occur; otherwise, fluid depletion and heat binding prevent Stomach harmony, leading not only to delirium but also to irritability and palpitations. This outlines the general principle of Cold Damage pathogens transmitting to Shaoyang.

[Collected Annotations] Wang Kentang stated: Headache and fever generally indicate exterior conditions. Why are these specific ones attributed to Shaoyang? Because the wiry-thin pulse indicates the pathogen has entered the Shaoyang boundary.

Yu Chang stated: Shaoyang Cold Damage prohibits sweating; Shaoyang Wind-Stroke prohibits vomiting and purging. Listing these two meanings makes the principles stricter. For Cold Damage headache and fever, even if sweating were appropriate, it is prohibited here; thus, for Wind-Stroke, it is certainly prohibited. For Wind-Stroke chest fullness and irritability, although vomiting/purging might seem appropriate, they are prohibited; thus, for Cold Damage, they are certainly prohibited. A wiry-thin pulse indicates the pathogen desires to enter the interior, and stomach fluids are already consumed by heat. Repeated sweating drives fluids outward, inevitably causing delirium.

Wang Hu stated: Mistaken sweating causes delirium by depriving fluids and drying the Stomach, leading to disordered speech. The Shaoyang pathogen has transferred to the Stomach. "Stomach harmonizes then recovers" means medication should be used to purge Stomach heat and restore harmony. If the Stomach does not harmonize, besides delirium, irritability and palpitations worsen, indicating Stomach heat offending the Heart, causing spiritual unrest.

After five or six days of Cold Damage or Wind-Stroke, presenting with alternating chills and fever, painful fullness in the chest and hypochondrium, silence with poor appetite, irritability, and frequent vomiting; or chest irritability without vomiting; or thirst; or abdominal pain; or hypochondriac stiffness; or epigastric palpitations with difficulty urinating; or no thirst with slight body heat; or coughing: Xiaochaihu Tang is the primary treatment.

[Annotation] This continues the previous three clauses, detailing symptoms to clarify treatment. After three or four days of Cold Damage or Wind-Stroke, observing bitter taste, dry throat, vertigo, and a wiry-thin pulse indicates transmission to Shaoyang. If accompanied by deafness, red eyes, chest fullness, and irritability, it indicates transmission from Wind-Stroke; if accompanied by headache, fever, and anhidrosis, it indicates transmission from Cold Damage. Now, at five or six days, the appearance of alternating chills and fever, painful chest/hypochondriac fullness, silence with poor appetite, irritability, and frequent vomiting indicates combined Wind-Stroke and Cold Damage signs. Shaoyang pathogens can advance to Taiyin interior or retreat to Taiyang exterior, residing in the semi-exterior semi-interior. If pathogens merge externally, unresolved semi-exterior causes chills; if merging internally, disharmonious semi-interior causes fever. Unpredictable location leads to alternating chills and fever. Shaoyang vessels descend through the chest and follow the hypochondrium; pathogens gathering here cause painful fullness. Shaoyang pathogens are close to Yin, causing silence. Shaoyang Wood pathology obstructs Earth (Spleen/Stomach), causing poor appetite. Pathogens in the chest/hypochondrium cannot vent fire, pressing upward on the Heart, causing irritability. Pathogens desiring to enter the interior meet resistance from interior Qi, causing vomiting; vomiting relaxes Wood Qi, hence the preference for vomiting. These are expected symptoms for Chaihu. Other symptoms may occasionally appear; Xiaochaihu Tang is the primary treatment, modified according to specific signs. Why distinguish Wind-Stroke/Cold Damage transmission but not treatment? Taiyang has Ying/Wei distinctions requiring strict differentiation, but upon transmission to Yangming and Shaoyang, Ying/Wei distinctions vanish, and pathogens transform into heat, unifying the treatment.

[Collected Annotations] Cheng Wuji stated: Pathogens between exterior and interior are called semi-exterior semi-interior. Cold Damage or Wind-Stroke means either one, not sequential attacks. Five or six days is when pathogens transmit from exterior to interior. Pathogens in exterior cause chills; in interior, heat. Here, between semi-exterior and semi-interior with no fixed location, alternating chills and fever occur. Pathogens in exterior do not cause abdominal fullness; in interior, they do. Chest/hypochondriac fullness indicates semi-exterior semi-interior status. Pathogens in exterior cause groaning; in interior, internal irritability. The Classic states: "Yang entering Yin becomes quiet." Silence occurs because pathogens move from exterior to interior, residing between them. Pathogens in exterior allow eating; in interior, they prevent it. Poor appetite, without total inability to eat, indicates semi-exterior semi-interior status. Pathogens in exterior cause no irritability/vomiting; in interior, they cause irritability/fullness/vomiting. Irritability with preference for vomiting indicates pathogens moving from exterior to interior. Initial entry into interior with no fixed location and varied transmission paths explains occasional symptoms.

Fang Youzhi stated: Five or six days is approximate. Alternating chills and fever occur when pathogens enter the space inside the shell but outside the zang-fu, the semi-exterior semi-interior domain of Shaoyang. Entering and merging with Yin causes chills; exiting and merging with Yang causes heat. Unpredictable movement causes alternating chills and fever. Taiyang has Ying/Wei differences requiring different treatments for Wind/Cold. Yangming is close to Taiyang, keeping Wind/Cold distinctions strict. Shaoyang is far from Taiyang past Yangming, so Wind/Cold treatments converge. The text interweaves Cold Damage/Wind-Stroke with alternating chills/fever to demonstrate that Wind and Cold unify at this stage.

Xiaochaihu Tang Formula
Chaihu (Half Jin), Huangqin (3 Liang), Renshen (3 Liang), Banxia (Washed, Half Sheng), Gancao (Roasted, 3 Liang), Shengjiang (Sliced, 3 Liang), Dazao (Broken, 12 pieces).

These seven ingredients are boiled in 12 Sheng of water to yield 6 Sheng, strained, and decocted again to yield 3 Sheng. Take 1 Sheng warm, three times daily.

Modification Rules: If chest irritability without vomiting, remove Banxia and Renshen, add Gualou Fruit (Trichosanthes Fruit) one piece. If thirsty, remove Banxia, increase Renshen to total 4.5 Liang, add Gualou Root (Trichosanthes Root) 4 Liang. If abdominal pain, remove Huangqin, add Shaoyao (Peony Root) 3 Liang. If hypochondriac stiffness, remove Dazao, add Muli (Oyster Shell) 4 Liang. If epigastric palpitations with difficulty urinating, remove Huangqin, add Fuling (Poria) 4 Liang. If no thirst with slight exterior heat, remove Renshen, add Guizhi (Cinnamon Twig) 3 Liang; take warm to induce slight sweating. If coughing, remove Renshen, Dazao, Shengjiang, add Wubeizi (Schisandra Berry) Half Sheng, Ganjiang (Dried Ginger) 2 Liang.

[Formula Analysis] For pathogens transmitting to Taiyang and Yangming, sweating, vomiting, and purging are used. For Shaoyang, only harmonization is suitable; the other three methods are contraindicated because pathogens are in the semi-exterior semi-interior, fighting within the inner boundary of the body. Semi-exterior involves external pathogens; semi-interior involves internal host qi. With pathogens and healthy qi stuck between boundaries, neither advancing nor retreating, harmonization is established. Chaihu resolves exterior cold in the Shaoyang meridian; Huangqin resolves interior heat in the Shaoyang Fu. To prevent Taiyin interior deficiency allowing Shaoyang meridian pathogens to invade, Shengjiang, Dazao, and Renshen are used to harmonize the middle and strengthen interior Qi, ensuring the interior is protected and harmonious, allowing pathogens to return to the exterior for resolution. Laypeople often indiscriminately use Xiaochaihu Tang as a standard prescription without assessing if pathogens are truly in the semi-exterior semi-interior or if harmonization is appropriate. Physicians feel safe using it, and patients appreciate its mild nature, unaware that this complacency causes significant harm. Therefore, physicians must anticipate conditions early and act promptly.

[Collected Exegesis] Cheng Yingmao stated: Named Xiaochaihu Tang to correspond with Shaoyang. The formulation principles and modifications embody the concept: "Upper Jiao opens, fluids descend, Stomach Qi harmonizes." Chaihu soothes Wood, dispersing semi-exterior pathogens externally; Huangqin clears fire, penetrating semi-interior pathogens internally; Banxia resolves phlegm-fluids, descending rebellious interior Qi; Renshen tonifies interior deficiency, aiding generating Qi; Gancao assists Chaihu/Huangqin to harmonize interior/exterior; Shengjiang/Dazao assist Renshen/Banxia to circulate Ying/Wei. Mutual support ensures pathogens do not move inward but resolve outward. For irritability without vomiting, dry-fire oppression of the chest requires removing Renshen/Banxia and adding Gualou Fruit. For thirst, dryness consuming fluids oppressing the Lung requires removing Banxia and adding Gualou Root. For abdominal pain, Wood Qi scattering into Earth confining Stomach Yang requires removing Huangqin to calm Earth and adding Shaoyao to restrain Wood. For hypochondriac stiffness, lingering pathogens causing Wood excess requires removing sweet-slowing Dazao and adding salty-softening Muli. For epigastric palpitations and difficult urination, Water pathogens offending the Heart require removing bitter-cold Huangqin and adding bland-draining Fuling. For no thirst with slight heat, semi-exterior cold lingering in muscles requires removing Renshen and adding Guizhi to resolve. For coughing, semi-exterior cold invading the Lung requires removing Renshen/Dazao, adding Wubeizi, replacing Shengjiang with Ganjiang to warm; Huangqin is retained despite Lung cold to prevent Ganjiang from aiding heat. In summary, Shaoyang pathology is semi-exterior semi-interior heat stagnating without ascending; Xiaochaihu Tang treats this by following the principles of ascending, descending, floating, and sinking.

If Cold Damage or Wind-Stroke presents with Chaihu syndrome, observing just one symptom is sufficient; all symptoms need not be present.

[Annotation] Continuing from above, regardless of Cold Damage or Wind-Stroke, if pathogens transmit to Shaoyang (semi-exterior semi-interior), and Chaihu syndrome is present, observing any single symptom allows for Xiaochaihu Tang modification; waiting for all symptoms is unnecessary.

[Collected Annotations] Fang Youzhi stated: This continues the previous clause to identify the main essence of Shaoyang disease.

Zheng Zhongguang stated: "Observing one Chaihu symptom is sufficient" means alternating chills and fever is a Chaihu symptom. If accompanied by hypochondriac fullness/stiffness, irritability/frequent vomiting, or any other symptom from the list, it indicates semi-exterior semi-interior status. Thus, "vomiting with fever" is treated with Xiaochaihu Tang. Chaihu is a pivot agent suitable for pathogens not fully in the exterior or interior. Hence, symptoms need not be complete, and formulas have modifications. However, differential diagnosis is crucial for similar Chaihu symptoms. For example, hypochondriac fullness/pain with thirst and drinking-induced vomiting contraindicates Chaihu Tang. Similarly, desire to vomit with chest pain and loose stools is not a Chaihu syndrome. These require careful discrimination.

On the third day of Cold Damage, if the Shaoyang pulse is small, the disease is about to resolve.

[Annotation] "Cold Damage" includes Wind-Stroke. On the third day, Shaoyang is affected. If the pulse is large, pathogens are strong and likely to transmit; if small, pathogens are weak and resolving spontaneously.

[Collected Annotations] Cheng Yingmao stated: A small pulse indicates Yang harmonizing with Yin, meaning pathogens have retreated and healthy Qi is recovering.

Zhang Xiqiu stated: Three days is the period governed by Shaoyang; a small pulse indicates disease retreat.

After four or five days of Cold Damage, presenting with body heat, aversion to wind, stiff neck, hypochondriac fullness, warm hands/feet, and thirst: Xiaochaihu Tang is the primary treatment.

[Annotation] Four or five days of Cold Damage places pathogens in the Three Yang stages. Body heat/aversion to wind is Taiyang; stiff neck is Taiyang/Yangming; hypochondriac fullness, warm extremities, and thirst are Yangming/Shaoyang. This is the onset of Three Yang Combined Disease. One must weigh urgency to treat. However, hypochondriac fullness, warm extremities, and thirst indicate a trend moving from exterior to interior, consolidating in Shaoyang. Thus, treatment focuses solely on Shaoyang. Xiaochaihu Tang harmonizes exterior and interior. This demonstrates that Three Yang Combined Disease does not require all Chaihu symptoms to be present, but the Chaihu method of harmonization is applicable.

[Collected Annotations] Fang Youzhi stated: Treating Three Yang combined disease solely via Shaoyang/Xiaochaihu Tang works because Taiyang/Yangming pathogens are mild, while Shaoyang is closer to the interior showing interior signs. Harmonizing Shaoyang achieves multiple benefits.

Yu Chang stated: Although exterior methods might seem appropriate for combined disease, warm extremities and thirst indicate exterior pathogens pressing into Shaoyang with a clear interior trend. Using acrid-sweet dispersal would increase heat and consume fluids. Xiaochaihu harmonization resolves Yang pathogens without injuring Yin fluids, achieving two goals at once. Modification: for no vomiting but thirst, remove Banxia and add Gualou Root.

Zhang Zhicong stated: "Warm hands/feet" means they are not cold. It is not patient-reported warmth but physician-palpated warmth. Otherwise, why state "body heat" and then "warm extremities"?

Wang Hu stated: This clause describes simultaneous involvement of all Three Yang meridians, predominantly Shaoyang. By day four or five of Taiyang Cold Damage, stating only "body heat" instead of "fever/aversion to wind" indicates declining Taiyang pathogens. Stating only "stiff neck" instead of "dry nose/restlessness" indicates declining Yangming pathogens. Only hypochondriac fullness is specific to Shaoyang. Combined with warm extremities and thirst, it confirms the trend of pathogens transmitting to the interior.

In Yangming disease, presenting with tidal fever, loose stools, normal urination, and persistent hypochondriac fullness: Give Xiaochaihu Tang.

[Annotation] Yangming tidal fever typically accompanies hard stools and frequent urination. Loose stools and normal urination indicate this is not Yangming Fu-organ tidal fever. Moreover, persistent hypochondriac fullness indicates Shaoyang syndrome. Therefore, treatment does not target Yangming but addresses Shaoyang with Xiaochaihu Tang.

[Collected Annotations] Wang Kentang stated: Yangming disease is "Stomach Fullness/Excess" (Wei Jia Shi). Describing loose stools as Yangming disease refers to Yangming exterior signs: body heat, sweating, aversion to heat rather than cold.