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Liu Zongnong stated: Regarding the syndrome of dizziness and vertigo (Xuan Yun), people generally attribute it to "excess above and deficiency below," yet they fail to explicitly explain the underlying reasons. By "deficiency" (Xu), we refer to blood and qi; by "excess" (Shi), we refer to phlegm-fluids, wind, and fire. Tracing the etiology, cases due to qi deficiency arise when clear qi fails to ascend, or result from excessive sweating leading to the loss of yang (Wang Yang); these should be treated with methods to raise yang and tonify qi. Cases due to blood deficiency occur when there is excessive blood loss, leaving yang without a foundation to attach to; these should be treated by nourishing yin and tonifying blood. These are all syndromes of insufficiency. Cases caused by the stagnation of phlegm-fluids require methods to resolve phlegm and guide out stagnation; in severe cases, emesis (Tu Fa) or purgation may be used. Cases triggered by wind and fire require clearing the upper jiao and descending fire. Those acquired through external pathogenic factors also fall under the category of excess syndromes. In the world, some practitioners encounter so-called "qi failing to return to its origin" and employ methods such as using mineral pills for sedation/anchoring or aromatic herbs like Chen Xiang to direct qi downward. However, aromatic substances are dispersing and deplete qi, while mineral pills assist fire; how can the displaced qi recover thereby? As stated in the *Neijing* (Inner Canon), treating disease requires seeking the root. For qi failing to return to its origin, one must seek the root cause and prescribe medication accordingly, which is the proper approach.

My father, Lord Shoufeng, enjoyed alcohol greatly during his youth, which led to alcohol-induced illness. From the age of forty onwards, he completely abstained from drinking. Later, at the age of seventy, due to the joy of New Year's Eve celebrations, he consumed a small cup of wine. The following morning, he suffered from severe dizziness and vertigo that prevented him from rising. My father was well-versed in the method of emesis (Tu Fa), as recorded in the chapter on Phlegm-Fluids. He employed this method to expel clear phlegm, and his dizziness and vertigo were instantly cured. Investigating the cause, how could a single cup of wine suddenly transform into phlegm? It was merely that the organs sensitive to wine were suddenly exposed to the aroma of wine, causing confusion and disorder between true yin and clear qi. Emesis removed the phlegm-fluids, eliminating the influence of the wine; emesis raises qi, allowing clear yang to restore itself. This appears to be treating phlegm, but is actually treating disorder. Thus, I record this case to elucidate its principle.

Wufu Yin (New Supplement 6) Qifu Yin (New Supplement 7) Sijunzi Tang (Tonify 1) Siwu Tang (Tonify 8) Zuogui Yin (New Supplement 2) Wu Junzi Jian (New Warm 6) Shen Zhuo Tang (Warm 129) Yougui Yin (New Supplement 3) Shiquan Dabu Tang (Tonify 20) Erchen Tang (Harmonize 1) Guipi Tang (Tonify 32) Buzhong Yiqi Tang (Tonify 30) Zhengyuan San (Warm 51) Shengshu Jian (New Warm 25) Dabu Yuan Jian (New Supplement 1) Qingzhou Baiwanzi (Harmonize 112) Heixi Dan (Warm 389) Banxia Baizhu Tianma Tang (Harmonize 15)