仲景曰。微数之脉。慎不可灸。因火为邪。则为烦逆。追虚逐实。
血散脉中。火气虽微。内攻有力。焦骨伤筋。血难复也。常氏云。宜桂
枝去芍药加蜀漆牡蛎龙骨救逆汤。欲其有汗。宜柴胡桂枝汤。
又曰。脉浮。当以汗解。而反灸之。邪无从出。因火而盛。病从腰
以下必重而 。名为火逆。若欲自解。当先烦。乃有汗。随汗而解。何
以知之。脉浮。故知汗出当解。
又曰。火逆下之。因烧针烦躁者。桂枝甘草龙骨牡蛎汤主之。
又曰。脉浮热甚而灸之。此为实。实以虚治。因火而动。必咽燥
吐血。
又曰。伤寒脉浮。医以火迫劫之。亡阳惊狂。卧起不安者。桂枝
去芍药加蜀漆牡蛎龙骨救逆汤。
庞氏曰。灸及烧针之后证以火劫者。并宜火劫法治之。烦躁惊
及狂。用六石风引汤尤良。柴胡加龙骨牡蛎汤亦通用。
又曰。不当灸而误灸。令火邪入腹。干错五脏。重加烦死。雍曰。
凡火邪逆证者。宜桂枝甘草龙骨牡蛎汤。
仲景曰。烧针令其汗。针处被寒。核起而赤者。必发奔豚。气从
少腹上冲心者。灸其核上一壮。与桂枝加桂汤。更加桂。
又曰。少阴病。得之一二日。口中和。其背恶寒者。当灸之。
又曰。少阴病。吐利。手足不逆冷。反发热者。不死。脉不至者。
灸少阴七壮。雍曰。凡灸少阴下利诸证。皆兼服四逆汤。
又曰。少阴病。下利。脉微涩。呕而汗出。必数更衣。反少。当温
其上。灸之。一云。灸厥阴五十壮。（当灸百会）
又曰。诸下利。皆可灸足大都五壮。（一云七壮）商邱阴陵泉皆
三壮。
又曰。下利。手足厥无脉。灸之不温。脉不还。反微喘者死。少阴
负趺阳者为顺也。
又曰。伤寒脉促。手足厥逆。可灸之。为灸少阴厥阴。主逆。
庞氏曰。当灸不灸。令病患冷结。久而弥固。气冲心必死。
张仲景说：脉象微细而数，千万不可施灸。因为火邪会成为致病因素，导致心烦气逆。这种做法会追逐虚损、加重实邪，致使血液在脉中散乱。虽然火气看似微弱，但内攻的力量却很强，会造成骨骼焦枯、筋脉损伤，血液难以恢复。常氏说：适宜使用桂枝去芍药加蜀漆牡蛎龙骨救逆汤。如果希望患者出汗，适宜使用柴胡桂枝汤。
又说：脉象浮，应当通过发汗来解除病邪，反而施以艾灸，病邪无处排出，因火邪的作用而亢盛，病症从腰部以下必定沉重且麻木不仁，这称为“火逆”。如果想要自行缓解，应当先感到烦闷，然后才有汗出，随着汗出而病解。怎么知道会这样呢？因为脉象浮，所以知道汗出后病当解除。
又说：火逆证误用下法，因烧针而导致烦躁的，用桂枝甘草龙骨牡蛎汤主治。
又说：脉象浮且热势严重却施以艾灸，这是实证，却用虚证的方法治疗，因火邪扰动，必然导致咽喉干燥、吐血。
又说：伤寒脉象浮，医生用火法强迫发汗，导致亡阳、惊狂、坐卧不安的，用桂枝去芍药加蜀漆牡蛎龙骨救逆汤。
庞氏说：灸法及烧针之后，若出现因火劫导致的证候，都适宜用火劫法治之（此处原文可能有误，结合语境应指针对火逆证的特定治法或反治，但依字面翻译为：并宜火劫法治之，意指针对此类变证的处理原则，或指需用重剂急救）。对于烦躁惊悸及狂乱，使用六石风引汤尤为良好。柴胡加龙骨牡蛎汤也通用。
又说：不应当施灸而误施灸，使火邪进入腹部，干扰五脏，再加上烦闷致死。郭雍说：凡是火邪逆乱的证候，适宜使用桂枝甘草龙骨牡蛎汤。
张仲景说：烧针令其出汗，针孔处受寒，起核状红肿的，必定发作奔豚病，气从少腹上冲心胸的，在其核上施灸一壮，并给予桂枝加桂汤，增加桂枝用量。
又说：少阴病，得病一二天，口中平和无苦味，背部恶寒的，应当施灸。
又说：少阴病，呕吐腹泻，手足不冰冷，反而发热的，不会死亡。脉象摸不到的，施灸少阴经穴位七壮。郭雍说：凡是灸治少阴病下利的各种证候，都兼服四逆汤。
又说：少阴病，下利，脉象微涩，呕吐且出汗，必定频繁更衣排便，但量反而很少，应当温补上部，施灸。另一说法是：施灸厥阴经五十壮。（应当灸百会穴）
又说：所有下利证，都可以灸足太阴脾经的大都穴五壮。（另一说法是七壮）商丘穴、阴陵泉穴皆灸三壮。
又说：下利，手足厥冷无脉，施灸后不温暖，脉象不还复，反而轻微喘息的，预后不良属死证。少阴脉弱于趺阳脉的为顺证。
Zhang Zhongjing said: When the pulse is fine and rapid (Wei Shu), moxibustion must be strictly avoided. Because fire becomes a pathogenic factor, leading to irritability and rebellious qi. This approach pursues deficiency and drives out reality (excess), causing blood to scatter within the vessels. Although the fire energy appears slight, its internal attack is powerful, scorching bones and injuring sinews, making blood difficult to restore. Chang Shi stated that Guizhi Qu Shaoyao Jia Shujie Muli Longgu Jiuni Tang (Cinnamon Twig Decoction without Paeonia plus Fleeceflower Root, Oyster Shell, and Dragon Bone for Rescue from Reversal) is suitable. If sweating is desired, Chaihu Guizhi Tang (Bupleurum and Cinnamon Twig Decoction) is suitable.
It is also said: When the pulse is floating (Fu), the disease should be resolved by inducing sweating. However, if moxibustion is applied in error, the pathogen has no outlet to exit. Due to the fire, the pathogen becomes prosperous. The disease below the waist will definitely feel heavy and numb (Zhong Mu). This is named Fire Reversal (Huo Ni). If it is to resolve spontaneously, there must first be irritability, followed by sweating, and resolution follows the sweat. How do we know this? Because the pulse is floating, we know that sweating will lead to resolution.
It is also said: In cases of Fire Reversal treated incorrectly with purgation, where burning needles cause irritability, Guizhi Gancao Longgu Muli Tang (Cinnamon Twig, Licorice, Oyster Shell, and Dragon Bone Decoction) is the primary treatment.
It is also said: When the pulse is floating and heat is severe, applying moxibustion constitutes treating an excess condition as if it were deficient. Driven by fire, it will inevitably cause dry throat and hemoptysis (vomiting blood).
It is also said: In Shanghan (Cold Damage) with a floating pulse, if a doctor uses fire methods to force sweating, resulting in loss of Yang, fright, mania, and restlessness (sitting and lying down uneasily), Guizhi Qu Shaoyao Jia Shujie Muli Longgu Jiuni Tang (Cinnamon Twig Decoction without Paeonia plus Fleeceflower Root, Oyster Shell, and Dragon Bone for Rescue from Reversal) should be used.
Pang Shi said: After moxibustion or burning needles, if symptoms arise due to fire coercion, they should be treated according to the principles for fire-induced conditions. For irritability, fright, and mania, Liushi Fengyin Tang (Six-Metal Wind-Driving Decoction) is particularly excellent. Chaihu Jia Longgu Muli Tang (Bupleurum Plus Oyster Shell and Dragon Bone Decoction) is also generally applicable.
It is also said: If moxibustion is mistakenly applied when inappropriate, allowing fire pathogen to enter the abdomen and disrupt the five Zang organs, compounded by irritability leading to death. Guo Yong stated: For all cases of Fire Pathogen Reversal, Guizhi Gancao Longgu Muli Tang (Cinnamon Twig, Licorice, Oyster Shell, and Dragon Bone Decoction) is suitable.
Zhang Zhongjing said: Burning needles to induce sweating, where the needle site is exposed to cold, forming nodules that are red, will inevitably trigger Ben Tun (Running Piglet Qi). If Qi rushes from the lower abdomen up to the heart, apply one moxa cone on top of the nodule, and administer Guizhi Jia Gui Tang (Cinnamon Twig Decoction with Added Cinnamon Twig), increasing the dosage of Rougui (Cinnamon Bark).
It is also said: In Shaoyin Disease, occurring one or two days after onset, with a normal mouth sensation (no bitter taste or dryness) and aversion to cold in the back, moxibustion should be applied.
It is also said: In Shaoyin Disease, with vomiting and diarrhea, but hands and feet are not cold, and instead there is fever, the prognosis is not fatal. If the pulse is imperceptible, apply seven moxa cones to Shaoyin acupoints. Guo Yong stated: For all cases of Shaoyin diarrhea treated with moxibustion, Sini Tang (Frigid Extremities Decoction) should be taken concurrently.
It is also said: In Shaoyin Disease, with diarrhea, a fine and choppy pulse, vomiting, and sweating, there will be frequent defecation attempts but with little output. One should warm the upper part and apply moxibustion. Another version states: Apply fifty moxa cones to Jueyin channels. (It should be Baihui GV20).
It is also said: For all types of diarrhea, Dada SP2 (Great Market) on the foot can be moxibusted with five cones. (Another version says seven cones). Shangqiu SP5 and Yinlingquan SP9 can each be moxibusted with three cones.
It is also said: In diarrhea with cold extremities and absent pulse, if moxibustion does not warm the body and the pulse does not return, but instead slight panting occurs, the prognosis is fatal. If the Shaoyin pulse is weaker than the Duboyang (Foot Yangming) pulse, it is considered a favorable sign.
It is also said: In Shanghan with a hurried pulse (Cu) and cold extremities, moxibustion can be applied. This is because moxibustion on Shaoyin and Jueyin channels treats reversal conditions.
Pang Shi said: If moxibustion should have been applied but was not, causing cold stagnation in the patient, which becomes firmly established over time, Qi rushing to the heart will result in death.