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Qin Zi said: I have observed Yan Yonghe's "Treatise on Vertigo and Tremor," which states that symptoms such as vertigo (dizziness) and tremor (shaking of limbs), as described in the *Neijing* (Classic of Internal Medicine), are all attributed to Liver Wind attacking upwards. Meanwhile, the *Yuanbing Shi* (Manual of Original Causes of Disease) explains that internal injuries caused by the Seven Emotions (Joy, Anger, Worry, Thought, Sorrow, Fear, Fright) can all lead to vertigo. Thus, he established four categories for external contraction of Wind, Cold, Summerheat, and Dampness, and two categories for internal injury due to Phlegm-Fluids and Lower Deficiency, which truly serves as a guide for vertigo. However, I regret that his coverage of the Six Qi (Wind, Cold, Summerheat, Dampness, Dryness, Fire) is incomplete, and his treatment of the Seven Emotions is insufficient. Furthermore, the indications for his prescribed formulas are difficult to apply. Liu Zongnong commented that while his description of symptoms was pertinent, his collection of formulas lacked clarity, which accurately hit upon their shortcomings. Now, I re-establish three categories for external contraction, encompassing the Six Qi internally; and four categories for internal injury, encompassing the Seven Emotions internally. The formulas for treating these conditions are matched precisely to the meridians and symptoms, and should not be neglected merely because they appear plain or unremarkable.

[Symptoms of Vertigo due to Wind-Cold] Headache, frontal headache, painful and heavy joints, fever with profuse sweating, wheezing and counterflow qi, irritability with occasional vertigo—these are symptoms of vertigo caused by Wind Pathogen. If there is fever without sweating, aversion to cold with bodily stiffness, headache, body pain, and frequent sensations of dizziness and clouded vision—these are symptoms of vertigo caused by Cold Pathogen.

[Causes of Vertigo due to Wind-Cold] Either when Wind Wood governs the climate and Wind-Heat erupts violently; or when the constitution is deficient and one is careless, leading to external contraction of Wind Pathogen. Wind belongs to Yang. When Wind-Heat becomes a pathogenic factor, it enters the Stomach, agitates Phlegm-Fluids, and also causes vertigo in people.

[Pulse Signs of Vertigo due to Wind-Cold] A floating and rapid pulse on the left indicates Taiyang Wind-Heat; a floating and wiry pulse on the left indicates Shaoyang Wind-Heat; a floating and rapid pulse on the right indicates Yangming Wind-Heat; [the text breaks off here regarding the right pulse].

[Treatment of Vertigo due to Wind-Cold] For a floating and rapid pulse on the left, indicating Taiyang Wind Pathogen, use Qianghuo Fangfeng Tang (Notopterygium and Saposhnikovia Decoction), adding Tianma (Gastrodia Rhizome) and Huangqin (Scutellaria Root). For a floating and wiry pulse on the left, indicating Shaoyang Wind-Heat... [text gap]; if the pulse is slippery and large, and symptoms include Phlegm-Fluids, use Daotan Tang (Great Phlegm-Fluid Resolving Decoction) adding Tianma (Gastrodia Rhizome) and Fangfeng (Saposhnikovia Root). For a floating and tight pulse on the left, indicating Taiyang Cold Pathogen, use Qiangdu Baidu Tang (Notopterygium and Angelica Pubescens Detoxification Decoction), adding Tianma (Gastrodia Rhizome) and Xixin (Asarum Root). For a wiry and tight pulse on the left, indicating Shaoyang Cold Pathogen, use Chaihu Qianghuo Tang (Bupleurum and Notopterygium Decoction), adding Tianma (Gastrodia Rhizome) and Chuanxiong (Ligusticum Chuanxiong Rhizome). For a floating and tight pulse on the right, indicating Yangming Cold Pathogen, use Gange Qianghuo Tang (Pueraria and Notopterygium Decoction), adding Tianma (Gastrodia Rhizome) and Shengma (Cimicifugae Rhizome). Generally, vertigo symptoms often involve concurrent Phlegm-Dampness; therefore, Tianma (Gastrodia Rhizome) is frequently used in formularies. Having clarified the first category above, the subsequent categories can be referenced and applied accordingly.

Qianghuo Fangfeng Tang (Notopterygium and Saposhnikovia Decoction): See section on Acid Weakness.
Chaihu Fangfeng Tang (Bupleurum and Saposhnikovia Decoction): This is Xiao Chaihu Tang (Minor Bupleurum Decoction) minus Banxia (Pinellia Tuber), plus Fangfeng (Saposhnikovia Root).
Gange Fangfeng Tang (Pueraria and Saposhnikovia Decoction)
Ingredients: Gange (Puerariae Radix), Shigao (Gypsum Fibrosum), Zhimu (Anemarrhenae Rhizoma), Gancao (Glycyrrhizae Radix et Rhizoma), Fangfeng (Saposhnikoviae Radix).
Daotan Tang (Great Phlegm-Fluid Resolving Decoction)
Ingredients: Nanxing (Arisaematis Cum Bile Rhizoma), Banxia (Pinelliae Rhizoma), Zhishi (Aurantii Fructus Immaturus), Gancao (Glycyrrhizae Radix et Rhizoma), Juhong (Citri Reticulatae Pericarpium Rubrum).
Qianghuo Baidu San (Notopterygium Detoxification Powder): See section on Cold Damage and Dysentery.
Chaihu Qianghuo Tang (Bupleurum and Notopterygium Decoction)
Ingredients: Chaihu (Bupleuri Radix), Qianghuo (Notopterygii Rhizoma et Radix), Fangfeng (Saposhnikoviae Radix), Chuanxiong (Ligustici Chuanxiong Rhizoma).
Gange Qianghuo Tang (Pueraria and Notopterygium Decoction)
Ingredients: Gange (Puerariae Radix), Qianghuo (Notopterygii Rhizoma et Radix), Fangfeng (Saposhnikoviae Radix), Baizhi (Angelicae Dahuricae Radix).