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Various wind diseases causing vertigo and tremors are attributed to the Liver. Treating them with Erchen Tang (Two-Chen Decoction) modified by adding Ephedrae Herba (Mahuang, 麻黄) and Atractylodis Rhizoma (Baizhu, 白术) is not difficult; for deficiency-induced vertigo, Cervus Cornu (Lurong, 鹿茸) must be relied upon; for excessive fire, using Rhei Radix et Rhizoma (Dahuang, 大黄) to purge fire brings peace.

Cough is a disease that can occur in all five zang and six fu organs, but it must transmit to the Lung before manifesting. The *Neijing* states: "The skin and hair are the exterior correspondence of the Lung."
Classics further state: "Exposure of the body to cold and consumption of cold drinks injure the Lung." For coughs caused by the combination of internal and external pathogens, treatment does not go beyond modifications of Xiao Qinglong Tang (Minor Blue Dragon Decoction). However, the character "combination" (he), as proposed by Yu Jiayan to expand the theoretical framework, is highly significant: "The Lung is like a bell; if struck by the qi of the six excesses from the outside, it rings from without; if struck by the pathogenic qi accumulated from seven emotions and sexual indulgence from within, it also rings from within. This ringing is the precise manifestation of cough." Therefore, whenever any pathogenic qi combines with the Lung, it becomes a cough; if it does not combine, there is no cough. There is no fixed formula for this syndrome, but the concept of "fluid retention" (shuiyin) is the root of cough. The *Shanghan Lun* states: "In cases of cough, remove Ginseng Radix et Rhizoma (Renshen)." Because Ginseng is rich in fluids and aids fluid retention. Thus, in the *Jingui Yaolue*, Xiao Qinglong Tang is modified into five formulas, all primarily focusing on promoting fluid metabolism. Ephedrae Herba (Mahuang, 麻黄), Cinnamomi Ramulus (Guizhi, 桂枝), and Paeoniae Radix Alba (Baishao, 芍药) may be added or removed as needed, but the three herbs—Zingiberis Rhizoma Recens (Ganjiang, 干姜), Asari Radix (Xixin, 细辛), and Schisandrae Fructus (Wuweizi, 五味子)—must never be omitted. For cold syndromes, Aconiti Lateralis Radix Praeparata (Fuzi, 附子) may be added; for heat syndromes, Gypsum Fibrosum (Shigao, 石膏) and Rhei Radix et Rhizoma (Dahuang, 大黄) may be added; for dampness syndromes, Atractylodis Rhizoma (Baizhu, 白术) and Polyporus (Fuling, 茯苓) may be added; for dryness syndromes, Asparagi Radix (Tianmendong, 天门冬), Ophiopogonis Radix (Mendong, 麦门冬), Donkey-hide Gelatin (Ejiao, 阿胶), Polygonati Odorati Rhizoma (Yuzhu, 玉竹), and Loquat Leaf (Pipaye, 枇杷叶) may be added; for lower jiao deficiency, Morinda Officinalis Radix (Bajitian, 巴戟天) and Cervus Cornu Colla (Lujiaojiao, 鹿角胶) may be added; for upper jiao deficiency, Astragali Radix (Huangqi, 黄芪) and Atractylodis Rhizoma (Baizhu, 白术) may be added; for excessive phlegm, Mori Cortex (Sangbaipi, 桑白皮) and Polyporus (Fuling, 茯苓) may be added. Sun Simiao (Sun Zhenren) grasped the secrets of this well. This syndrome is not solely at the exterior level, but since the Lung governs the skin and hair, it is also categorized under exterior syndromes.

(Commentary on Classics) In *Suwen: Treatise on Cough*, Qibo stated: "All five zang and six fu organs can cause cough, not just the Lung." He further said: "The skin and hair are the exterior correspondence of the Lung; when the skin and hair are first invaded by pathogenic factors, the pathogens enter via this correspondence." *Shi Congrong Lun* states: "Cough accompanied by vexation and distress is due to the rebellion of Kidney qi. Wheezing and coughing result from water qi merging with the Yangming channel." *Yinyang Yingxiang Dalun* states: "Injury by dampness in autumn leads to cough in winter." *Lingshu: Lunji Zhenshi* also mentions this. *Shengqi Tongtian Lun* states: "Injury by dampness in autumn causes upward rebellion leading to cough." Luo Longji commented: "Dampness is naturally the ruling factor of late summer; if it invades excessively during autumn, the Lung is injured by dampness. When the Kan Water dominates in winter, cough arises." He Baizhai stated: "*Huangdi Neijing Suwen Xuanji Yuanbing Shi* posits that 'ke' (cough with sound but no phlegm) indicates Lung qi injury and lack of clarity; 'sou' (cough with phlegm but no sound) indicates Spleen disturbance generating dampness and phlegm; 'kesou' (cough with both sound and phlegm) occurs because Lung qi is moved by Spleen dampness, resulting in cough followed by sou." I privately believe that this discussion on the two syndromes of ke and sou is essentially reversed. The Lung is the master of qi, and sound emerges from it. When the Lung is injured by cold and fluid retention, it condenses into phlegm. Sound desires to ascend but is obstructed by phlegm, so they clash and produce sound. Once phlegm is expelled, the sound becomes clear; this is called "ke." When external wind-cold binds the lung passages, sound emission is hindered, causing a clash and sound production, yet there is no physical object; this is called "sou." The character "ke" contains the radical "hai," which signifies tangible objects; hence, fruit pits and grass seeds contain "hai," implying separation or barrier. The character "sou" consists of "shu" (bind/constrain) and "chui" (blow); this is the ingenuity of ancient Chinese character formation, marking the distinction between these two syndromes.