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(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.