（法二十五条 论三篇 律十一条）
六气，春主厥阴风木，秋主阳明燥金，冬主太阳寒水，各行其政。惟春分以后，秋分以前，少阳相火，少阴君火，
太阴湿土，三气合行其事。是故天本热也，而益以日之暑；日本烈也，而载以地之湿；三气交动，时分时合。其分也，
以风动于中，胜湿解蒸，不觉其苦。其合也，天之热气下，地之湿气上，人在气交之中，受其炎蒸，无隙可避，多有体
倦神昏，肌肤 起，胸膺痤出，头面疖生者矣。甚则消渴痈疽，吐泻疟痢，又无所不病矣。其不能澹泊滋味，屏逐声色
者，且以湿热预伤金水二脏，为秋冬发病之根。故病之繁而且苛者，莫如夏月为最。夫天气无形之热，与地气有形之湿
交合，而大生广生之机益彰，然杀机每伏于生机之内。所称移星易宿，龙蛇起陆者，即于夏月见之，人身亦然。《内经》
运气主病，凡属少阴君火，即与太阴湿土一类同推，不分彼此。而太阴司天，湿淫所胜，平以苦热，佐以酸辛，以苦燥
之，以淡泄之，治湿之法则然矣。下文即出治热之法云∶湿上甚而热，治以苦温，佐以甘辛，以汗为故而止，可见湿淫
而至于上甚，即为热淫，其人之汗，必为湿热所郁，而不能外泄，故不更治其湿，但令汗出如其故常，斯热从汗散。其
上甚之湿，即随之俱散耳。观于《内经》湿热二气合推，即以得汗互解，妙义彰彰矣。
仲景以痉病、湿病、喝病，
共为太阳经外感之候者，合而名篇。盖痉为热病之最恶者，而要皆为湿热之所酿，正从三气交动中，会其微旨也。然三
气杂病，非伤寒之比者，曷可枚举。但有一端为时令所乘，即当推三气主病。何有何无，孰浅孰深，以求确然之治。如
当风冒湿，饮醇啖爆，精津素亏，热毒内蕴，湿邪久着之体，发为疮疡、疟、痢、黄瘅、肿满、消渴、痿厥之病，既有
湿热多寡之不同，又有气血虚实之各异，向非深入轩岐仲景堂奥，而取途于诸家之狭隘，所称活人手眼，果安在哉？故
会三气交病之义，以审脉辨证用方，其于湿热之孰多孰少，治疗之从上从下，补救之先阴先阳，纤悉毕贯矣。不遵圣法，
而欲免过差，其可得乎？
《金匮》论痉病，于风木主事之时，蚤已申不可汗下之戒云∶夫风病下之则痉，复发汗必拘急。见风与热合而生病，
风则内应肝而主筋，热则内应心而主脉，妄下损阴，则筋失养而成痉。妄汗损阳，则脉失养而拘急矣。至湿 所酿之痉，
其不可汗下之意，则为少变，维时阳气在外，既屡以发汗为戒，及遇无汗之刚痉，又不得不用葛根汤，取其微汗。至于
下法，全不示戒，且云可与大承气汤，其意甚微。见身内之阴，为外热所耗，容有不得不下之证，但十中不得一二，终
非可训之定法。略举其端，听用者之裁酌耳。热亦见风寒之邪中人，不可妄用苦寒，湿热之邪中人，不可妄用辛温矣。
论《金匮》治痉用栝蒌根桂枝汤方 本文云∶太阳病，其证备，身体强。KT KT 然，脉反沉迟，此为痉，
栝蒌根桂枝汤主之。伤寒方中，治项背KT KT ，用桂枝加葛根汤矣。此因时令不同，故方亦少变，彼之汗出恶风，
其邪在表。而此之太阳证，罔不具备，其邪之亦在于表可知也，但以脉之沉迟，知其在表之邪，为内湿所持而不解。即
系湿热二邪交合，不当从风寒之表法起见，故不用葛根之发汗解肌，改用栝蒌根味苦入阴，擅生津彻热之长者为君，合
之桂枝汤，和荣卫，养筋脉，而治其痉，乃变表法为和法也。
论《金匮》治痉用葛根汤方 本文云∶太阳病，无汗。而小便反少，气上冲胸，口噤不得语，欲作刚痉，葛根
汤主之。《伤寒论》太阳篇中，项背KT KT ，无汗恶风者，用葛根汤。此证亦用之者，以其邪在太阳阳明两经之界，
两经之热，并于胸中，必延伤肺金清肃之气，故水道不行，而小便少，津液不布而无汗也。阳明之筋脉，内结胃口。
外行胸中，过人迎环口。热并阳明，斯筋脉牵引，口噤不得语也。然刚痉无汗，必从汗解，况湿邪内郁，必以汗出如故
而止。故用此汤，合解两经之湿热与风寒之表法，无害其同也。
论《金匮》治痉用大承气汤方 本文云∶痉为病，胸满，口噤，卧不着席，脚挛急，必 齿。可与大承气汤。
仲景之用此方，其说甚长，乃死里求生之法也。《灵枢》谓热而痉者死，腰折螈 齿 也。兹所云卧不着席，即腰折之变
文，脚挛急，即螈 之变文。且 齿加以胸满口噤，上中下三焦，热邪充斥，死不旋踵矣。何以投是汤乎？在伤寒证腹
满可下，胸满则不可下。又何以投是汤乎？须知所谓胸满不可下者，谓其邪尚在表，未入于里，故不可下，此证入里之
热，极深极重，匪可比伦。况阳热至极，阴血立至消亡，即小小下之，尚不足以胜其阳救其阴，故取用大下之方。以承
领其一线之阴气，阴气不尽为阳热所劫，因而得生者多矣。可与二字甚活，临证酌而用之，初非定法也。既有下之重伤
其阴之大戒，复有下之急救其阴之活法，学人欲为深造，端在斯矣。
（治疗法则二十五条，论述三篇，禁忌十一条）
六气之中，春季由厥阴风木主令，秋季由阳明燥金主令，冬季由太阳寒水主令，各自行使职权。只有春分之后、秋分之前这段时间，少阳相火、少阴君火与太阴湿土这三气共同发挥作用。因此，天空本属热，又加上日头的暑热；大地本属烈，又承载了地气的湿气；这三气相互交动，时而分离，时而聚合。当它们分离时，风气在中间流动，胜过湿气并解除蒸腾之热，人并不觉得痛苦。当它们聚合时，天的热气下降，地的湿气上升，人处于天地之气交接的空间中，受到炎热和潮湿的熏蒸，无处可以躲避，很多人会出现身体疲倦、精神昏沉、肌肤出现疹点、胸膺部生出痤疮、头面部发生疖肿等症状。严重时甚至会出现消渴、痈疽、呕吐腹泻、疟疾痢疾等病症，几乎无所不病。那些不能清淡饮食、戒除声色欲望的人，会预先损伤肺（金）和肾（水）两脏，成为秋冬季节发病的病根。所以，病情繁杂且严重的，没有比夏季月份更甚的了。天气中的无形之热与地气中的有形之湿相互交合，使得万物生长繁衍的生机更加显著，然而杀机往往潜伏在生机之内。所谓“移星易宿，龙蛇起陆”的现象，就在夏季月份显现，人体也是如此。《黄帝内经》运气学说中的主病规律，凡是属于少阴君火的，都与太阴湿土归为一类进行推演，不分彼此。而当太阴湿土司天时，湿气淫盛而获胜，治疗应以苦热之药为主，辅以酸辛之药，用苦味来燥湿，用淡味来泄湿，这是治疗湿邪的一般法则。下文接着提出治疗热邪的方法说：“湿气在上部严重并伴有热象，用苦温药物治疗，辅以甘辛药物，以出汗作为痊愈的标准即止。”由此可见，湿气淫盛至于上部严重，就等同于热邪淫盛，此时病人的汗液必然被湿热所郁闭，无法向外排泄，所以不再单独治疗湿邪，只要让汗出恢复正常状态，那么热邪就会随着汗液发散出去。那在上部严重的湿气，也就随之一起散去了。观察《黄帝内经》将湿热二气合并推演，并以得汗作为两者共同解除的关键，其中的精妙义理非常明显。
张仲景将痉病、湿病、暍病（中暑），共同作为太阳经受外感邪气的证候，合并命名为一篇。大概因为痉病是热病中最凶险的一种，而其根本原因都是湿热酿成，这正是从三气交动的过程中，领会其微妙的旨意。然而这三种气杂合导致的疾病，不像伤寒那样可以一一列举。但只要有一端被时令邪气所乘袭，就应当推究这三气的主病规律。分析病因有和无、病位浅和深，以求得确切的治疗方案。例如，因受风冒湿、饮用美酒、食用辛辣爆炒食物，导致精气津液素来亏损，热毒内蕴，湿邪久留体内的体质，发作出疮疡、疟疾、痢疾、黄疸、肿胀满闷、消渴、痿证厥逆等疾病，这既有湿热多少的不同，又有气血虚实的差异。如果不是深入钻研黄帝、岐伯及张仲景医学理论的精髓，而是取法于各家医书的狭隘观点，所谓的灵活诊疗手段，究竟在哪里呢？因此，要融会贯通三气交病的意义，通过审察脉象、辨证施治来选用方剂，对于湿热孰多孰少、治疗是从上焦还是下焦入手、补救是先滋阴还是先扶阳，都能细致周全地把握。如果不遵循圣人的法则，却想避免过失差错，可能吗？
《金匮要略》论述痉病时，在风木主事的时候，早就申明不可使用发汗和下法的禁忌说：“患风病如果用下法，会导致痉病；如果再次发汗，必然导致肢体拘急。”见到风与热结合而生病，风邪内应肝脏而主管筋脉，热邪内应心脏而主管血脉，妄用下法损伤阴液，则筋脉失去滋养而成痉病；妄用汗法损伤阳气，则血脉失去滋养而导致拘急。至于湿邪所酿成的痉病，其不可发汗和下法的用意，则略有变化。当时阳气在外，已经多次告诫不可发汗，但遇到无汗的刚痉病，又不得不使用葛根汤，取其微微出汗的效果。至于下法，完全没有给予禁忌，并且说可以使用大承气汤，其中的意思非常微妙。这说明体内阴液被外部热邪消耗，或许有不得不使用下法的证候，但十个人中不到一两个，终究不是可以效法的固定法则。只是列举其端倪，听凭使用者自行裁量斟酌罢了。热邪也可见到风寒邪气中人，不可妄用苦寒药物；湿热邪气中人，不可妄用辛温药物。
论《金匮要略》治疗痉病使用栝蒌根桂枝汤方。原文说：“太阳病，症状具备，身体强直，腘窝拘紧不舒，脉象反而沉迟，这是痉病，用栝蒌根桂枝汤主治。”在伤寒方剂中，治疗项背强直不舒，使用的是桂枝加葛根汤。这里因为时令不同，所以方剂也稍有变化。之前的桂枝加葛根汤证是汗出恶风，邪气在表。而这里的太阳病证候无不具备，邪气也在表是可以知道的，但因为脉象沉迟，知道在表的邪气被内湿所持留而不能解散。这就是湿热二邪交合，不应当从风寒的表证治法来考虑，所以不用葛根的发表解肌作用，改用栝蒌根，因其味苦入阴，擅长生津液、透达热邪，作为君药，配合桂枝汤，调和营卫，滋养筋脉，从而治疗痉病，这是将解表法变为调和法。
论《金匮要略》治疗痉病使用葛根汤方。原文说：“太阳病，无汗，而且小便反而减少，气向上冲撞胸部，牙关紧闭不能说话，将要发作刚痉，用葛根汤主治。”《伤寒论》太阳篇中，项背强直不舒，无汗恶风的，使用葛根汤。这个证候也使用它，是因为邪气位于太阳经和阳明经的交界，两经的热邪都汇聚在胸中，必然会延及损伤肺金清肃下降的气机，所以水道不通畅，导致小便少，津液不能布散而无汗。阳明的筋脉，内部结聚于胃口，外部行于胸中，经过人迎穴环绕口角。热邪并入阳明经，就会导致筋脉牵引，牙关紧闭不能说话。然而刚痉无汗，必须通过发汗来解除，况且湿邪内郁，必须以汗出恢复正常状态为治愈标准。所以使用此汤，既能解除两经的湿热，又能兼顾风寒的表证治法，二者并无妨害。
论《金匮要略》治疗痉病使用大承气汤方。原文说：“痉病，表现为胸部胀满，牙关紧闭，睡觉时背部反张不着席（角弓反张），脚部痉挛拘急，必定磨牙。可以使用大承气汤。”张仲景使用这个方剂，道理很长，这是死里求生的方法。《灵枢》说热邪导致痉病会死亡，表现为腰背反折、抽搐、磨牙。这里所说的“卧不着席”，就是腰背反折的变文描述；“脚挛急”，就是抽搐的变文描述。再加上胸部胀满、牙关紧闭，上、中、下三焦热邪充斥，死亡就在眨眼之间了。为什么投用这个汤剂呢？在伤寒证中，腹部胀满可以用下法，胸部胀满则不可用下法。又为什么投用这个汤剂呢？须知所谓“胸满不可下”，是指邪气还在体表，未进入体内，所以不可用下法。而这个证候是进入体内的热邪，极其深重，不可同日而语。况且阳热达到极致，阴血立刻面临消亡，即使轻微地使用下法，还不足以战胜阳热、挽救阴液，所以采用峻下的方剂。以此来承接留住一线尚存的阴气，如果阴气不被阳热完全劫夺，因而得以生存的情况很多。“可与”二字非常灵活，临证时酌情使用，起初并不是固定的法则。既然有下法重伤阴液的大禁忌，又有下法急救阴液的灵活用法，学习者想要达到高深造诣，关键在于此。
(Five-and-twenty Treatment Principles, Three Discourses on Theory, Eleven Prohibitions)
Among the Six Qi (Six Climate Factors), Spring is governed by Jueyin Wind-Wood, Autumn by Yangming Dryness-Metal, and Winter by Taiyang Cold-Water, each exercising its authority. Only between the Spring Equinox and the Autumn Equinox do Shaoyang Ministerial Fire, Shaoyin Sovereign Fire, and Taiyin Damp-Earth jointly govern affairs. Thus, Heaven is inherently hot, further intensified by the Sun's summer heat; Earth is inherently intense, bearing the dampness of the ground. These three Qi interact, sometimes separating and sometimes merging. When separated, wind moves within, overcoming dampness and dissipating steaming heat, so people feel no distress. When merged, Heavenly heat descends and Earthly dampness ascends. Humans, situated in the intersection of these Qi, are subjected to scorching heat and humidity with no refuge available. Many suffer from physical fatigue, mental confusion, skin eruptions, chest acne, and facial boils. In severe cases, conditions such as Xiao Ke (Wasting-Thirst), carbuncles and ulcers, vomiting and diarrhea, malaria, and dysentery occur, leaving no disease unrepresented. Those who cannot maintain a bland diet and abstain from sensual pleasures will prematurely injure the Lung (Metal) and Kidney (Water) organs, establishing the root for diseases in autumn and winter. Therefore, among all seasons, summer presents the most complex and severe illnesses. The formless heat of Heaven and the tangible dampness of Earth combine, further manifesting the mechanism of vast generation and growth; however, the mechanism of destruction often lurks within the mechanism of life. Phenomena described as "stars shifting and constellations changing, dragons and snakes emerging from land" are seen in summer, and the human body is no different. According to the Disease-Causation principles of Yunqi (Five Movements and Six Qi) in *Neijing* (*Huangdi Neijing*), any condition attributed to Shaoyin Sovereign Fire is deduced together with Taiyin Damp-Earth, without distinction. When Taiyin Damp-Earth governs the year, and dampness prevails excessively, treatment should employ bitter-hot substances as primary agents, assisted by sour and acrid ones, using bitterness to dry dampness and lightness to drain it. This is the standard principle for treating dampness. The text subsequently introduces the method for treating heat: "When dampness is excessive at the upper level accompanied by heat, treat with bitter-warm substances, assisted by sweet-acrid ones, ceasing when sweating occurs." This indicates that when dampness is excessive at the upper level, it equates to heat excess. The patient's sweat must be constrained by damp-heat and unable to excrete outward. Therefore, one does not treat dampness separately but ensures sweating returns to normal, allowing heat to dissipate through sweat. The dampness excessive at the upper level disperses along with it. Observing *Neijing*'s combined deduction of damp-heat and their mutual resolution through sweating reveals profound and evident principles.
Zhang Zhongjing grouped Spasm (Jing Bing), Dampness (Shi Bing), and Heatstroke (Ye Bing) as external contraction manifestations of the Taiyang Meridian, naming them collectively in one chapter. This is because spasm is the most malignant form of heat disease, yet fundamentally caused by damp-heat brewing, precisely aligning with the subtle intent of the interaction of the three Qi. However, diseases mixed by these three Qi differ from Shanghan (Cold Damage) and cannot be enumerated individually. If any aspect is attacked by seasonal pathogens, one must deduce the primary diseases of the three Qi. Analyzing presence or absence, superficiality or depth, allows for precise treatment. For instance, in constitutions exposed to wind and dampness, consuming rich alcohol and spicy fried foods, where essence and fluids are originally deficient, internal heat-toxins accumulate, and damp pathogens linger, diseases such as sores, malaria, dysentery, jaundice, swelling and fullness, wasting-thirst, flaccidity, and cold extremities may erupt. These vary in the proportion of damp-heat and the deficiency or excess of Qi and Blood. Without deeply exploring the profound teachings of Huangdi, Qibo, and Zhang Zhongjing, and instead relying on the narrow approaches of various schools, where would true clinical expertise lie? Thus, integrating the meaning of diseases caused by the interaction of the three Qi, examining pulses and differentiating syndromes to select formulas, one can meticulously grasp whether damp-heat predominates, whether treatment should target the upper or lower levels, and whether rescue should prioritize Yin or Yang. Failing to follow sage methods while hoping to avoid errors—is this possible?
In discussing Spasm in *Jinkui Yaolue*, during the time when Wind-Wood governs, warnings against sweating and purging were issued early: "If wind disease is treated with purgatives, spasm results; if sweating is re-induced, stiffness and constraint occur." Seeing that wind combines with heat to cause disease, wind internally corresponds to the Liver and governs tendons, while heat internally corresponds to the Heart and governs vessels. Reckless purging damages Yin, causing tendons to lose nourishment and resulting in spasm. Reckless sweating damages Yang, causing vessels to lose nourishment and leading to constraint. For spasm brewed by dampness, the rationale against sweating and purging varies slightly. At that time, Yang Qi was on the exterior, and warnings against sweating were frequent. Yet, in cases of Gang Jing (Stiff Spasm) with no sweat, Gegen Tang (Kudzu Decoction) had to be used to induce mild sweating. Regarding purging, no warning was given, and it stated Da Chengqi Tang (Major Order the Qi Decoction) could be used, implying subtle reasoning. It suggests that internal Yin is consumed by external heat, creating situations where purging might be necessary, though this applies to less than one in ten cases, making it non-standard practice. Only the outline is presented for practitioners to judge. Heat also involves pathogenic factors like wind-cold attacking humans; bitter-cold should not be used recklessly. Damp-heat attacking humans; acrid-warm should not be used recklessly.
Regarding the use of Gualougen Guizhi Tang (Trichosanthes Root and Cinnamon Twig Decoction) for Spasm in *Jinkui*: The text states: "Taiyang disease, with all symptoms present, body stiffness, and stiffness in the popliteal fossa, pulse appearing deep and slow, this is Spasm, treated with Gualougen Guizai Tang." In Shanghan formulas, for neck and back stiffness, Guizhi Jia Gegen Tang (Cinnamon Twig plus Kudzu Decoction) is used. Here, due to different seasons, the formula varies slightly. The previous case involved sweating and aversion to wind, with pathogen in the exterior. Here, Taiyang symptoms are fully present, indicating the pathogen is also in the exterior. However, the deep and slow pulse indicates the exterior pathogen is retained by internal dampness and unresolved. This represents an interaction of damp-heat, not fitting the exterior pattern of wind-cold. Thus, Gegen's diaphoretic and muscle-releasing properties are not used. Instead, Gualougen is chosen as the sovereign herb for its bitter taste entering Yin, excelling in generating fluids and clearing heat. Combined with Guizhi Tang to harmonize Ying and Wei and nourish tendons and vessels, it treats spasm by transforming an exterior-releasing method into a harmonizing method.
Regarding the use of Gegen Tang (Kudzu Decoction) for Spasm in *Jinkui*: The text states: "Taiyang disease, no sweat, urine volume unexpectedly low, Qi rushing up to the chest, jaw locked preventing speech, impending Gang Jing (Stiff Spasm), treated with Gegen Tang." In the Taiyang chapter of *Shanghan Lun*, for neck/back stiffness, no sweat, and aversion to wind, Gegen Tang is used. This case uses it because the pathogen lies at the boundary of the Taiyang and Yangming meridians. Heat from both meridians converges in the chest, damaging the Lung Metal's clear and descending Qi. Consequently, water pathways fail, urine decreases, and fluids fail to distribute, causing no sweat. Yangming tendons knot internally at the stomach opening and run externally through the chest, passing the Renying point around the mouth. Heat merging into Yangming causes tendon traction, locking the jaw and preventing speech. Since Gang Jing has no sweat, it must resolve through sweating. Moreover, internal damp stagnation requires sweating to return to normal for cure. Thus, this decoction resolves damp-heat in both meridians while addressing the exterior pattern of wind-cold, without conflict.
Regarding the use of Da Chengqi Tang (Major Order the Qi Decoction) for Spasm in *Jinkui*: The text states: "Spasm disease, characterized by chest fullness, jaw lock, inability to lie flat (opisthotonos), leg cramps, and teeth grinding. Da Chengqi Tang may be used." Zhang Zhongjing's use of this formula involves lengthy reasoning, representing a method of seeking life amidst death. *Lingshu* states that heat-induced spasm leads to death, manifested as opisthotonos, convulsions, and teeth grinding. "Unable to lie flat" here describes opisthotonos; "leg cramps" describes convulsions. Added to chest fullness and jaw lock, heat pathogens fill the Upper, Middle, and Lower Jiao, leading to imminent death. Why administer this decoction? In Shanghan patterns, abdominal fullness permits purging, but chest fullness does not. Why here? One must understand that "chest fullness prohibits purging" refers to pathogens still in the exterior, not having entered the interior. This case involves interior heat that is extremely deep and severe, incomparable to exterior patterns. Furthermore, extreme Yang heat causes immediate consumption of Yin blood. Even mild purging is insufficient to overcome Yang and save Yin; thus, a strong purgative is taken to preserve the last thread of Yin Qi. If Yin Qi is not entirely robbed by Yang heat, survival is likely. The phrase "may be used" is flexible, to be applied based on clinical judgment, not a fixed rule. Having both the major prohibition against purging injuring Yin and the flexible method of purging to urgently save Yin, learners aiming for advanced mastery should focus on this.