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Taiyang Wind-Strike (Taiyang Zhongfeng, a syndrome caused by wind pathogen attacking the Wei level) is when wind damages the Wei Qi (Defensive Qi); Cold Damage (Shanghan, a syndrome caused by cold pathogen attacking the Ying level) is when cold damages the Ying Blood (Nutritive Blood). These explanations have been detailed in the Upper and Middle Chapters. Here, we address cases where both Wind and Cold simultaneously injure the body, causing disease in both Ying and Wei levels, organizing them into the Lower Chapter. Generally, the two energies of Wind and Cold often accompany each other and rarely separate; when there is cold, there is not necessarily no wind, and when there is wind, there is not necessarily no cold. When Wind and Cold occur together, pathogens invade the human body, causing simultaneous disease in Ying and Wei. As long as the symptoms present with anhidrosis (absence of sweating), they are all classified as Excess Pathogens (Excess syndromes characterized by strong pathogenic factors). Therefore, the method of Dual Resolution (treating both exterior and interior or multiple pathogenic factors simultaneously) using Da Qing Long Tang (Major Blue Dragon Decoction) is established to release the externally closed Cold pathogen and the internally stagnant Wind pathogen, treating the restlessness and irritability caused by anhidrosis. However, one must carefully examine that the patient's pulse is not weak or thready, and that there are no Shaoyin disease patterns, before administering it. If mistakenly used, it will cause profuse sweating, cold limbs (Jue Ni), twitching of tendons and muscles, inevitably leading to the collapse of Yang (Wang Yang). Therefore, Zhen Wu Tang (True Warrior Decoction) is established to remedy the errors caused by Da Qing Long Tang. For conditions with Exterior Cold and Interior Heat, Da Qing Long Tang is indeed appropriate. If both Exterior and Interior are hot, then Da Qing Long Tang is insufficient, so Bai Hu Tang (White Tiger Decoction) is established to supplement the inadequacy of Da Qing Long Tang. As for mild Cold and Heat symptoms, Gui Zhi Er Yue Bi Yi Tang (Cinnamon Twig Twice and Minor Yellow Dragon Once Decoction), Ma Huang Gui Zhi Ban Tang (Ephedra and Cinnamon Twig Half-Decoction), and Gui Zhi Er Ma Huang Yi Tang (Cinnamon Twig Twice and Ephedra Once Decoction) are proposed; these are all methods of dual resolution for Ying and Wei. By studying the Upper and Middle Chapters thoroughly, these three methods will become clear, and their application in treatment will likely prevent confusion.

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In Taiyang Wind-Strike, if the pulse is Floating-Tight, accompanied by fever, aversion to cold, body pain, anhidrosis, and restlessness/irritability, Da Qing Long Tang (Major Blue Dragon Decoction) should be administered. If the pulse is Weak-Thready, with sweating and aversion to wind, it must not be taken; taking it will result in cold limbs and twitching of tendons and muscles, which constitutes a therapeutic error.
[Annotation]
In Taiyang Wind-Strike, the pulse should be Floating-Slow. The current Floating-Tight pulse indicates that the Wind-Strike disease is combined with the pulse pattern of Cold Damage. Wind-Strike typically presents without body pain and with spontaneous sweating; the current body pain and anhidrosis indicate that the Wind-Strike disease is combined with the symptoms of Cold Damage. Anhidrosis with restlessness/irrigability is caused by the steaming of heat due to stagnation in the Taiyang channel. Wind is a Yang pathogen; Cold is a Yin pathogen. Yin-Cold stagnating on the exterior causes anhidrosis, while Yang-Heat steaming internally causes restlessness/irritability. This is a case of simultaneous injury by Wind and Cold, affecting both Ying and Wei. Therefore, Mahuang Tang (Ephedra Decoction) and Guizhi Tang (Cinnamon Twig Decoction) are combined with Shigao (Gypsum Fibrosum) to formulate Da Qing Long Tang (Major Blue Dragon Decoction), used to resolve the Excess Pathogen affecting both Ying and Wei. If the pulse is Weak-Thready, with sweating and aversion to wind, even if restlessness/irritability is present, it is the restlessness of Shaoyin, not Taiyang. It is strictly forbidden to administer. Doing so will lead to cold limbs and twitching of tendons and muscles, accelerating the collapse of Yang. Thus, it is said: this is a therapeutic error.
[Collected Annotations]
Cheng Wuji stated: When Wind predominates in the Wei level, it results in weak Ying and strong Wei; when Cold predominates in the Ying level, it results in strong Ying and weak Wei. Now, since both Wind and Cold injure the body, Ying and Wei are both Excess, making Da Qing Long Tang (Major Blue Dragon Decoction) appropriate.
Yu Chang stated: Da Qing Long Tang (Major Blue Dragon Decoction) is prescribed for Taiyang anhidrosis. How does it differ from Mahuang Tang (Ephedra Decoction)? Because the accompanying symptom of restlessness/irritability makes this method necessary for resolution.
Cheng Yingmao stated: This decoction is not prescribed merely for restlessness/irritability, but specifically for restlessness/irritability caused by anhidrosis. If the pulse is Weak-Thready, with sweating and aversion to wind, even if restlessness/irritability exists, it is a sign of Yang collapse in Shaoyin, completely different from the steaming caused by anhidrosis.

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In Cold Damage, if the pulse is Floating-Slow, the body does not ache but feels heavy, occasionally feeling lighter at times, and there are no Shaoyin disease patterns, Da Qing Long Tang (Major Blue Dragon Decoction) should be used to induce sweating.
[Annotation]
In Cold Damage, the pulse should be Floating-Tight. The current Floating-Slow pulse indicates that the Cold Damage disease is combined with the pulse pattern of Wind-Strike. Cold Damage typically involves body ache; the current absence of body ache indicates that the Cold Damage disease is combined with the symptoms of Wind-Strike. Lightness of the body indicates the pathogen is in the Yang level; heaviness indicates the pathogen is in the Yin level; "occasionally feeling lighter" means that although the body feels heavy, it sometimes alleviates. If there is only drowsiness and constant heaviness without relief, it is a Shaoyin disease pattern. Currently, there is no drowsiness; although the body is heavy, it occasionally feels lighter, so it is not a Shaoyin disease pattern, but rather a Taiyang disease pattern involving both Ying and Wei. Although the pulse is Floating-Slow, the symptom is anhidrosis, classifying it as an Excess Pathogen; therefore, Da Qing Long Tang (Major Blue Dragon Decoction) is also used to induce sweating. The previous clause prohibited use based on weak pulse and sweating; this clause clarifies by excluding Shaoyin patterns, demonstrating extreme caution and thoroughness. These two clauses follow the first and second clauses of the Upper Chapter and the Middle Chapter, reiterating Taiyang simultaneous injury by Wind and Cold, serving as the outline for Ying-Wei simultaneous disease in the Lower Chapter. Henceforth, whenever Taiyang Wind-Strike and Cold Damage are mentioned involving simultaneous Ying-Wei disease, they refer to these two clauses.
[Collected Annotations]
Fang Youzhi stated: Da Qing Long Tang (Major Blue Dragon Decoction) uses "should be administered" in one instance and "should be used to induce sweating" in another. Why? "Should be administered" refers to the urgency of restlessness/irritability, associated with movement; "should be used to induce sweating" refers to the silence of mere heaviness, associated with stillness.
Yu Chang stated: The six characters "no Shaoyin pattern," "only heaviness, occasionally lighter," already point this out clearly. It means that if there is only body heaviness without Shaoyin drowsiness, the presence of Cold can be determined; furthermore, since it occasionally feels lighter, unlike Shaoyin where heaviness persists day and night, the presence of Wind can also be determined. Thus, there is no doubt about forcefully driving out the Wind and Cold on the exterior. If the pulse is Weak-Thready, body is heavy, and there is drowsiness, attending to the internal Shaoyin deficiency would be urgent enough; how could one dare to induce sweating? He further stated: Carefully examining the text of these two clauses, Wind-Strike pulse is originally Floating-Slow, yet here appears Floating-Tight; Cold Damage pulse is originally Floating-Tight, yet here appears Floating-Slow. This is Wind-Strike showing signs of Cold, and Cold Damage showing signs of Wind, beyond doubt. One must also distinguish the absence of mixed Shaoyin patterns before using Qing Long [Tang]; then, ten thousand applications will be successful. Therefore, if the pulse is Weak-Thready, Da Qing Long Tang (Major Blue Dragon Decoction) cannot be used, because Shaoyin disease pulses are invariably micro-thready. Fang's annotation: Clinging to the character "weak" to explain it as the Wind-Strike pulse, interpreting it as Yang floating and Yin weak. This fails to consider that Wind-Strike pulses and mis-sweating syndromes were fully detailed in the Upper Taiyang Chapter; here, the emphasis is solely on distinguishing Shaoyin. Since the Taiyang Bladder Channel and Shaoyin Kidney Channel are exterior-interior pairs, in individuals with Yin deficiency, exterior pathogens may invade the Kidney organ from the Bladder without waiting for transmission. Moreover, in complex cases like simultaneous contraction or Yin-clasping, careful observation is required during clinical practice. If Shaoyin is not deficient, how could exterior pathogens cross over to produce symptoms like heaviness and drowsiness! Therefore, if Shaoyin patterns exist, and exterior dispersion is不得已 (unavoidable), there are methods to warm the channels and scatter pathogens while balancing both aspects. How can one rashly use the potent agent Qing Long [Tang] to instantly uproot solitary Yang!
Wei Litong stated: The symptom of body heaviness must be clearly distinguished. If drowsiness accompanies constant heaviness, it belongs to Shaoyin. Mistakenly inducing sweating leads to upper Jue and lower exhaustion in Shaoyin Heat patterns, or twitching of tendons and muscles in Shaoyin Cold patterns. Both commit the same error of violating the prohibition against mistaken sweating.