仲景曰∶伤寒一二日至四五日而厥者，必发热，前热者，后必厥。厥深者，热亦深。厥
微者，热亦微。厥应下之，而反发汗者，必口伤烂赤。凡厥者，阴阳气不相顺接便为厥。厥
者，手足逆冷是也。厥少热多，其病当愈。寒多热少，阳气退，其病为进也。
详此仲景之厥逆，颇与《内经》有异。盖以手足言之，在《内经》则有寒厥、热厥之分
；在仲景则单以逆冷者为厥。再以邪正言之，在《内经》则论在元气，故其变出百端，而在
气在血俱有危证；在仲景则论在邪气，故单据手足，而所畏者则在阴进而阳退也。观成无己
曰∶厥为阴之盛也，义可知矣。诸伤寒厥逆等证，俱详具伤寒门。
厥逆之证，危证也。盖厥者，尽也。逆者，乱也。即气血败乱之谓也，故《内经》特重
而详言之。如云卒厥、暴厥者，皆厥逆之总名也。如云寒厥、热厥者，分厥逆之阴阳也。
如云连经，连脏者，论厥逆之死生也。再若诸经脏腑之辨，亦既详矣。又近世犹有气厥、血
厥、痰厥、酒厥、脏厥、蛔厥等证，亦无非本之经义。观《内经》诸论已极明显，奈何后人
犹不能察？凡遇此证，则悉认之为中风，竟不知厥逆为何病，而通作风治，害孰甚焉！余深悲
之，故于前非风门悉力辨正。至于治此之法，即当以前非风证治互相参用，正所以治厥逆也
。其有未尽等证，仍列如后条。
Zhang Zhongjing stated: In the course of cold damage (Shanghan), if extremity coldness (Jue) occurs from the first or second day to the fourth or fifth day, it must be accompanied by fever. If there was fever previously, there will inevitably be extremity coldness later. The deeper the extremity coldness, the deeper the heat; the milder the extremity coldness, the milder the heat. Extremity coldness should be treated with purgation; if sweating is used in error, it will inevitably cause oral injury and redness/ulceration. All cases of Jue occur because Yin and Yang Qi fail to connect smoothly. Jue refers to coldness extending up to the hands and feet. If Jue predominates over heat, the disease should resolve; if cold predominates over heat, Yang Qi is retreating, and the disease is progressing.
Upon detailed examination, Zhang Zhongjing’s discussion of Jue Ni differs somewhat from that in the *Nei Jing* (Inner Canon). Speaking of the hands and feet, the *Nei Jing* distinguishes between Cold Jue and Heat Jue; whereas Zhang Zhongjing defines Jue solely by the presence of coldness. Speaking of pathogenic factors versus healthy Qi, the *Nei Jing* discusses issues rooted in Yuan Qi (Primal Qi), leading to myriad variations where critical conditions can arise in both Qi and Blood; whereas Zhang Zhongjing focuses on pathogenic factors, relying only on symptoms in the hands and feet, with the primary concern being the advance of Yin and the retreat of Yang. Cheng Wuji observed: "Jue represents the flourishing of Yin," which clarifies its meaning. Various syndromes such as cold damage and Jue Ni are detailed in the section on Cold Damage.
The syndrome of Jue Ni is a critical condition. "Jue" means exhaustion; "Ni" means disorder. It refers to the collapse and chaos of Qi and Blood, which is why the *Nei Jing* places great emphasis on it and discusses it in detail. For instance, Cu Jue (Sudden Jue) and Bao Jue (Violent Jue) are general terms for Jue Ni. Cold Jue and Heat Jue distinguish the Yin-Yang nature of Jue Ni. "Connecting to meridians" and "connecting to zang-organs" discuss the prognosis of life and death in Jue Ni. Furthermore, the differentiation among various meridians and zang-fu organs has already been discussed in detail. Additionally, in more recent times, there have been syndromes such as Qi Jue, Blood Jue, Phlegm Jue, Wine Jue, Zang Jue, and Ascariasis Jue, all of which are based on classical principles. The discussions in the *Nei Jing* are extremely clear; why is it that later generations still fail to perceive this? Whenever encountering such syndromes, they are all mistaken for Wind Stroke (Zhong Feng), without knowing what Jue Ni actually is, and are universally treated as wind disorders. What harm could be greater than this? I deeply lament this, which is why I vigorously corrected these errors in the preceding section on Non-Wind Disorders. As for the treatment methods for this condition, one should refer mutually to the treatments for Non-Wind Syndromes mentioned earlier; this is precisely how Jue Ni should be treated. Other syndromes not fully covered here are listed in the following articles.