伤寒脉浮缓身不疼但重乍有轻时无少阴证者大青龙汤主之
伤寒脉浮紧身疼痛缘表被寒束而经气壅塞也此脉浮缓而身不痛但觉体重而已然亦乍有轻时是非外寒之微而实里热之
盛再于他处征之别无少阴证者宜大青龙外发表寒而内清里热也 风脉浮缓浮紧者必传入阳明以营郁而生里热卫闭而不能
泄也寒脉浮紧浮缓者必传入阳明以卫郁而生里热营泄而不能外闭也（阳明腑热则气蒸汗泄寒不能闭）中风多传阳明若其
脉微弱无阳明证而将入少阴则又用真武阳明多传少阴若其脉浮缓无少阴证而将入阳明又用青龙风寒对举参伍尽变立法精
矣伤寒阳明太阴脉俱浮缓（阳明篇脉浮而缓手足自温者是谓系在太阴至七八日大便硬者为阳明病也）大青龙之浮缓则
阳明之缓非太阴之缓也脉法寸口脉微而缓缓者胃气实实则谷消而水化也灵枢津液五别中热则胃中消谷肠胃充廓故胃缓胃
缓是以脉缓缓者胃气之脉也或改此条作小青龙证不通之极脉法紧则为寒小青龙证内外皆寒其脉必紧安有浮缓之理
（三章 太阳入太阴少阴去路）
中风大青龙之证外有风而内有热也伤寒之小青龙证表有寒而里有水也大小青龙外之解表则同而内之温清大异大青龙
可以泄里热而不可以温内寒小青龙所以佐大青龙之不逮也伤寒之人或表邪外郁而宿水里发或渴饮凉水而停留不消是以多
有水气之证以其热渴双解表里之寒小青龙乃不易之法也
伤寒病，脉象浮缓，身体不疼痛只是沉重，偶尔有减轻的时候，且没有少阴病的证候，用大青龙汤主治。
伤寒病，脉象浮紧，身体疼痛，是因为体表被寒邪束缚，导致经络之气壅塞不通；此处的脉象浮缓，身体不痛只觉得沉重，然而也偶尔有减轻的时候，这不是因为外感寒邪轻微，而是实际上体内热盛。再在其他方面验证，如果没有少阴病的证候，适宜用大青龙汤，以发散表寒并清泄里热。
风邪致病，脉象浮缓或浮紧，必定传入阳明经，因为营气郁滞而生里热，卫气闭塞而不能宣泄；寒邪致病，脉象浮紧或浮缓，必定传入阳明经，因为卫气郁滞而生里热，营气泄出而不能在外闭藏（如果阳明腑热，则气蒸腾而汗液排泄，寒邪不能闭阻）。中风多传入阳明，如果其脉微弱，没有阳明病证候，而将要传入少阴，则又使用真武汤；阳明病多传入少阴，如果其脉浮缓，没有少阴病证候，而将要传入阳明，又使用青龙汤。风寒相对并举，参互错综，穷尽了变化，立法精妙啊。伤寒病中，阳明经和太阴经的脉象都可见浮缓（《阳明篇》说：脉浮而缓，手足自然温暖，这是属于系在太阴；到了七八天，大便变硬，就是阳明病了）。大青龙汤证的浮缓，不同于阳明病的缓，更不同于太阴病的缓。脉法中说：寸口脉微而缓，缓者代表胃气充实，充实则食物消化而水液运化。《灵枢·津液五别》中说：体内有热则胃中消谷，肠胃充盈扩张，所以胃气弛缓。胃气弛缓，因此脉象缓者是胃气的脉象。有人将此条改为小青龙证，真是荒谬至极。脉法说：紧脉主寒。小青龙证内外皆寒，其脉必定是紧脉，怎么会有浮缓的道理呢？
（第三章 太阳病转入太阴、少阴的路径）
中风病的大青龙证，是外有风邪而内有热；伤寒病的小青龙证，是表有寒邪而里有水饮。大青龙和小青龙在外部解表方面相同，但在内部温阳与清热的治法上差异很大。大青龙可以泄除里热，但不可以温补内寒；小青龙是用来辅助大青龙所不及之处的。患伤寒的人，或者表邪外郁而宿有的水饮内发，或者因口渴饮用凉水而导致水饮停留不消，因此多有水气为患的证候。用小青龙汤来同时解除表里之寒与水饮，是不易改变的方法。
In cold damage (Shanghan) with a floating and slow pulse, where the body is not painful but heavy, occasionally becoming lighter, and without signs of Shaoyin disease, Da Qing Long Tang (Great Blue Dragon Decoction) is the primary treatment.
In cold damage with a floating and tight pulse accompanied by body pain, this occurs because the exterior is constrained by cold pathogens, leading to congestion and obstruction of the meridian qi. In contrast, here the pulse is floating and slow, the body is not painful but feels heavy, yet it occasionally becomes lighter. This indicates that the condition is not due to mild external cold, but rather an actual excess of interior heat. Verifying in other aspects, if there are no signs of Shaoyin disease, Da Qing Long Tang should be used to release the exterior cold and clear the interior heat.
Wind-pathogen diseases presenting with floating and slow or floating and tight pulses will inevitably transmit to the Yangming channel, as Ying (Nutritive) Qi stagnation generates interior heat while Wei (Defensive) Qi closure prevents its venting. Cold-pathogen diseases presenting with floating and tight or floating and slow pulses will also inevitably transmit to the Yangming channel, as Wei Qi stagnation generates interior heat while Ying Qi leakage prevents exterior closure (if Yangming Fu-organ heat is present, Qi steams and sweat is excreted, preventing cold from closing the pores). Wind-stroke typically transmits to Yangming; if the pulse is weak and minute, lacking Yangming signs but approaching Shaoyin, Zhen Wu Tang (True Warrior Decoction) is used. Yangming disease often transmits to Shaoyin; if the pulse is floating and slow, lacking Shaoyin signs but approaching Yangming, Qing Long formulas are used. By juxtaposing wind and cold, and analyzing their interwoven variations, the therapeutic principles are established with exquisite precision. In cold damage, both Yangming and Taiyin channels may present with floating and slow pulses (The Yangming Chapter states: "A floating and slow pulse with naturally warm hands and feet indicates attachment to Taiyin; after seven to eight days, hard stool indicates Yangming disease"). The floating and slow pulse in Da Qing Long Tang syndrome differs from the slow pulse in Yangming disease, which in turn differs from the slow pulse in Taiyin disease. Pulse methodology states: "A subtle and slow pulse at the Cun Kou position indicates substantial Stomach Qi; when substantial, food is digested and water is transformed." *Ling Shu: Jin Ye Wu Bie* states: "Interior heat causes the Stomach to digest grain rapidly, filling and expanding the intestines and stomach, thus causing the Stomach Qi to become lax." This laxity of Stomach Qi results in a slow pulse; therefore, a slow pulse represents Stomach Qi. To alter this clause to Xiao Qing Long Tang (Lesser Blue Dragon Decoction) syndrome is extremely absurd. Pulse methodology states: "Tightness indicates cold." In Xiao Qing Long Tang syndrome, both interior and exterior are cold, so the pulse must be tight; how could it possibly be floating and slow?
(Chapter 3: Pathways from Taiyang to Taiyin and Shaoyin)
The Da Qing Long Tang syndrome in wind-stroke involves external wind and internal heat. The Xiao Qing Long Tang syndrome in cold damage involves external cold and internal water retention. While both Da and Xiao Qing Long Tangs share the function of releasing the exterior, their internal approaches—warming versus clearing—are vastly different. Da Qing Long Tang can drain interior heat but cannot warm internal cold; Xiao Qing Long Tang serves to supplement what Da Qing Long Tang cannot achieve. Patients with cold damage may have exterior pathogenic constraint triggering latent water retention, or they may drink cold water due to thirst, causing water to remain undigested. Consequently, water-dampness syndromes are common. Using Xiao Qing Long Tang to simultaneously resolve exterior cold and internal water is an unchangeable method.