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Plague (Wenyi) in the present day requires attention to Daquan Yin (Betel Nut Decoction, containing Betel Nut 2 qian, Caoguo and Licorice Root each 0.5 qian, Magnolia Bark, Peony Root, Scutellaria Root, and Anemarrhena Rhizome each 1 qian). One should not blindly follow Wu Youke's (Wu Yike) one-sided assertion that his Daquan Yin, if it causes dryness and burns Yin, will first deplete the source of sweat, preventing sweating and exacerbating the condition. When foul qi enters through the nose, yellow saliva is vomited; contracting seasonal pathogens leads to high fever and irritability (referring to fever accompanied by mental restlessness). Baidu San (Ginseng Decoction for Overcoming Toxins) and Huoxiang Zhengqi San (Agastache Powder for Rectifying the Qi) represent two distinct therapeutic pathways: the former is a formula for dispersing pathogens (allowing formulas like Ginseng Decoction for Overcoming Toxins to disperse pathogens, resolving them via the meridians), while the latter is a formula for resolving filth (allowing Agastache Powder for Rectifying the Qi to resolve filth, expelling pathogens via the mouth and nose); each has its specific expertise. Fangfeng Tongsheng San (Saposhnikovia Universal Benefit Powder) is a miraculous formula used when external syndromes require diaphoresis and internal syndromes are urgent, necessitating simultaneous resolution of both exterior and interior. The use of Baihu Tang (White Tiger Decoction) and the three Chengqi Tangs (Descending the Surge Decoctions) depends on distinguishing deficiency and excess: for heat, thirst, spontaneous sweating, with no excess in the exterior or interior, use Baihu Tang; for constipation, use the three Chengqi Tangs.

Yin-deficiency night sweats (Dao Han) stem from congenital insufficiency. Nighttime fever accompanied by sweating during sleep, which ceases gradually upon waking, is termed night sweats; Danggui Liuhuang Tang (Angelica Six-Huang Decoction) is appropriate. If there is frequent aversion to cold, sweating upon slight movement, or even spontaneous sweating without movement, it is named Yang-deficiency spontaneous sweating (Zi Han); Fuzi Tang (Aconite Decoction), Shenfu Tang (Ginseng-Aconite Decoction), and Zhufu Tang (Atractylodes-Aconite Decoction) are indicated. However, since Yin and Yang are mutually rooted, rigid adherence is inadvisable; thoroughly studying the *Huangdi Neijing* (Yellow Emperor's Inner Canon) will naturally reveal the appropriate treatment. Zhang Jingyue stated there are six conditions that should not be treated: 1. Sweating accompanied by severe asthma/dyspnea; 2. Sweating with pulse depletion; 3. Sweating with severe body pain; 4. Sweating with hair dampness extending to the vertex; 5. Sweating resembling oil; 6. Sweating resembling pearls. Physicians must not administer medication recklessly. This syndrome is classified under exterior syndromes because sweat exits through the skin pores.

(Interpretation of Classical Texts) The *Yin-Yang Yingxiang Dalun* (Great Treatise on the Correspondence of Yin and Yang) states: "Human sweat is named after the rain of heaven and earth." The *Xuanming Wuqi Pian* (Chapter on the Five Qi Manifested Clearly) states: "The Heart governs sweat." The *Ping Re Bing Lun* (Treatise on Evaluating Heat Diseases) states: "In cases of Yin deficiency, Yang inevitably congregates, resulting in shortness of breath, intermittent fever, and sweating." The *Jueqi Pian* (Chapter on Determining Essence and Qi) states: "When essence-fluids are depleted, the interstices open, leading to profuse sweating." The *Zangqi Fazhi Lun* (Treatise on the Timing of Organ Manifestations) states: "In Lung diseases, there is shoulder and back pain with sweating; in Kidney diseases, there is night sweating and aversion to wind." The *Maiyao Jingwei Lun* (Treatise on the Essentials of Pulse Diagnosis) states: "Excess Yang manifests as body heat without sweat; excess Yin manifests as excessive sweating with cold body; excess in both Yin and Yang results in no sweat and coldness."