帝曰∶其客于六腑者，何也？岐伯曰∶此亦其食饮
居处，为其病本也。六腑亦各有俞，风寒湿气中其俞，而食饮应之，循俞而入，各舍其腑也。
此言外邪由内邪引之深入者，故其食饮居处为之病本也。六腑各有俞，邪中于俞，而内伤应之，邪即乘虚
入舍于腑而成痹也。
帝曰∶营卫之气，亦令人痹乎？岐伯曰∶营者，水谷之精气也，和调于五脏，洒陈于六腑，乃能入于脉
也，故循脉上下，贯五脏，络六腑也；卫者，水谷之悍气也，其气 疾滑利，不能入于脉也，故循皮肤之中，
分肉之间，熏于盲膜，散于胸腹。逆其气则病，从其气则愈。不与风寒湿气合，故不为痹。
上言邪舍于合而成痹，又云由俞入舍于腑，故帝又问营卫受邪，亦能成痹否。然营者，水谷之精气，所谓
清者为营是也，其气纯粹氤氲，故和调于五脏，洒陈于六腑，如甘澜之优游浸灌，而后入于脉，故曰营行脉中，
即循脉上下，而贯脏络腑也；卫者，水谷之悍气，所谓浊者为卫是也，其气 疾滑利，则不能入于脉，故曰卫
行脉外，即循皮肤之中，分肉之间，熏于盲膜，散于胸腹，此营卫之气，同源异流者也。如感邪而逆其气则病，顺
其气之流行则愈。不与风寒湿气相合，故不为痹也。大抵营卫之气，周流内外，倘遇邪阻，即有寒热头痛等病
发现。其成痹者，以风寒湿气错杂之邪，表发未透，留滞于合、于俞，着而成痹，由浅入深，如上所明者是也。
帝曰∶痹或痛，或不痛，或不仁，或寒，或热，或燥，或湿，其故何也？岐伯曰∶痛者，寒气多也，有寒
故痛也；其不痛、不仁者，病久入深，营卫之行涩，经
络时疏，故不痛，皮肤不营，故为不仁；其寒者，阳气少，阴气多，与病相益，故寒也；其热者，阳气多，阴
气少，病气胜，阳遭阴，故为痹热；其多汗而濡者，此其逢湿甚也，阳气少，阴气盛，两气相感，故汗出而濡也。
人身阴阳气血，各有偏胜，风寒湿邪，多寡不同，而伤有表里浅深，故病状多端。人身阳少阴多，则与病
邪相益而为寒；阳多阴少，阳遭阴痹，郁而成热；湿多则为汗，湿亦阴邪，阳气少也。盖外邪有阴阳，又随人
身之阴阳偏胜而变病，故必审其阴阳、表里、虚实、寒热而施治法也。
帝曰∶痹之为病，不痛何也？岐伯曰∶痹在于骨则重，在于脉则血凝而不流，在于筋则屈而不伸，在于肉
则不仁，在皮则寒，故具此五者，则不痛也。凡痹之类，逢寒则急，逢热则纵。
上言痛者，寒气多也，其有不痛者，必风湿邪胜。湿气滞着，则有身重、血凝、筋屈不伸、肉不仁、
皮寒之五端。故具此五者，而非寒多，则不痛也。大凡痹之为病，逢寒则经脉紧急而多痛，逢热则经脉缓纵而
不痛，寒兼湿则重着，热兼湿必多汗，兼风则行走，行走而寒束之，亦必痛，湿合之，必多汗也。故其变化虽
多，总不出阴阳虚实四端而已。
黄帝问道：邪气侵犯六腑，是怎么回事？岐伯回答说：这也是因为饮食不节和起居失常，成为了发病的根本。六腑各有对应的背俞穴，风寒湿邪侵袭这些俞穴，而体内的饮食内伤与之相应，邪气便顺着俞穴进入，分别停留在各自的腑中。
这是说外邪由内邪引导而深入体内，所以饮食起居失常是发病的根本原因。六腑各有俞穴，邪气中于俞穴，而内脏受伤与之相应，邪气便乘虚侵入并停留于腑中，从而形成痹证。
黄帝问道：营气和卫气，也会使人发生痹证吗？岐伯回答说：营气，是水谷所化生的精气，它在五脏中调和，散布于六腑，然后才能进入脉管中，所以它沿着脉管上下运行，贯穿五脏，联络六腑；卫气，是水谷所化生的悍气，它的性质剽疾滑利，不能进入脉管中，所以它行走在皮肤之中，肌肉间隙之间，熏蒸于盲膜（膈膜），散布于胸腹。如果违背了这种气的正常运行就会生病，顺应它就会痊愈。因为它不与风寒湿邪相合，所以不会形成痹证。
上文提到邪气停留于关节而成痹，又说由俞穴进入并停留于腑中，所以黄帝又问营卫受邪是否也能形成痹证。然而营气是水谷的精气，也就是所谓“清者为营”，它的性质纯粹温和，所以能在五脏中调和，散布于六腑，像甘澜水那样悠闲地浸润灌溉，然后才进入脉管，所以说“营行脉中”，即沿着脉管上下运行，贯穿脏腑；卫气是水谷的悍气，也就是所谓“浊者为卫”，它的性质剽疾滑利，所以不能进入脉管，所以说“卫行脉外”，即行走在皮肤之中，肌肉间隙之间，熏蒸于盲膜，散布于胸腹，这就是营卫之气同源而异流的情况。如果感受邪气而逆乱了气的运行就会生病，顺应气的流行就会痊愈。因为它不与风寒湿邪相合，所以不会形成痹证。大抵营卫之气在体内内外周流，如果遇到邪气阻滞，就会出现寒热、头痛等疾病。那些形成痹证的，是因为风寒湿错杂之邪，在体表发散不透，留滞于关节和俞穴，附着而成痹证，由浅入深，就像上面说明的那样。
黄帝问道：痹证有的疼痛，有的不疼痛，有的麻木不仁，有的发冷，有的发热，有的干燥，有的湿润，这是什么缘故呢？岐伯回答说：疼痛的，是因为寒气多，有寒所以疼痛；那些不疼痛、麻木不仁的，是因为病程长久，病邪深入，营卫运行涩滞，经络时常疏泄不通，所以不疼痛，皮肤得不到营血的濡养，所以表现为麻木不仁；那些发冷的，是因为阳气少，阴气多，与病邪相互助长，所以感到寒冷；那些发热的，是因为阳气多，阴气少，病气盛，阳被阴郁遏，所以形成痹热；那些多汗且湿润的，是因为逢受了严重的湿邪，阳气少，阴气盛，两气相互感应，所以出汗且湿润。
人体的阴阳气血各有偏胜，风寒湿邪的多寡也不同，而且伤害有表里浅深之分，所以病症表现多种多样。人体如果阳少阴多，就会与病邪相互助长而表现为寒；阳多阴少，阳气被阴邪郁遏，郁结而成热；湿气重则多汗，湿也是阴邪，说明阳气不足。大概外邪也有阴阳属性，又会随着人体阴阳的偏胜而变化病症，所以必须审察其阴阳、表里、虚实、寒热，然后施以治疗方法。
黄帝问道：痹证作为疾病，为什么不痛呢？岐伯回答说：痹证在骨则身体沉重，在脉则血液凝滞而不流动，在筋则屈伸不利，在肉则麻木不仁，在皮则感觉寒冷，所以具备这五种情况，就不会疼痛。凡是痹证这类疾病，遇到寒邪则经脉拘急，遇到热邪则经脉弛纵。
上文说疼痛的是寒气多，那些不疼痛的，必定是风湿邪气偏胜。湿气停滞附着，就会出现身重、血凝、筋屈不伸、肉麻木、皮寒冷的五种表现。所以具备这五种情况，而不是寒气多，就不会疼痛。大凡痹证这种疾病，遇到寒邪则经脉紧急而多疼痛，遇到热邪则经脉缓纵而不疼痛，寒兼湿则沉重着滞，热兼湿必然多汗，兼风则疼痛游走不定，游走而又被寒邪束闭，也必然疼痛，湿邪结合，必然多汗。所以虽然变化很多，总不出阴阳虚实四个方面而已。
Huangdi asked: What happens when pathogenic factors invade the six fu organs? Qibo replied: This is also because improper diet and lifestyle serve as the root cause of the disease. Each of the six fu organs has its corresponding Shu points (Back-Shu acupoints). When wind, cold, and dampness pathogens attack these Shu points, and internal injury from diet responds to it, the pathogens follow the Shu points inward and settle in their respective fu organs.
This refers to external pathogens being guided deep into the body by internal pathogens; thus, improper diet and lifestyle are the root causes. The six fu organs each have Shu points; when pathogens strike the Shu points and internal injuries respond, the pathogens take advantage of the deficiency to enter and settle in the fu organs, forming Bi syndrome (obstruction syndrome).
Huangdi asked: Do Ying (Nutrient) Qi and Wei (Defensive) Qi also cause Bi syndrome? Qibo replied: Ying Qi is the essence-qi derived from food and water. It harmonizes within the five zang organs and spreads throughout the six fu organs, only then entering the vessels. Therefore, it circulates up and down along the vessels, penetrating the five zang organs and connecting with the six fu organs. Wei Qi is the fierce qi derived from food and water. Its nature is swift, slippery, and smooth; it cannot enter the vessels. Therefore, it circulates within the skin and between the muscle layers, steaming the blind membranes (phrenic membrane), and dispersing in the chest and abdomen. If one goes against this qi's normal flow, illness occurs; if one follows it, recovery ensues. Since it does not combine with wind, cold, or dampness pathogens, it does not form Bi syndrome.
The previous text mentioned that pathogens settling in joints form Bi syndrome, and further stated that pathogens enter via Shu points and settle in the fu organs. Thus, Huangdi again asked whether Ying and Wei Qi receiving pathogens can also form Bi syndrome. However, Ying Qi is the essence-qi of food and water, known as "the clear part becomes Ying." Its nature is pure and gentle, so it harmonizes in the five zang organs and spreads in the six fu organs, irrigating like gentle waves before entering the vessels. Hence it is said that "Ying circulates within the vessels," meaning it moves up and down along the vessels, penetrating zang and connecting with fu. Wei Qi is the fierce qi of food and water, known as "the turbid part becomes Wei." Its nature is swift and slippery, so it cannot enter the vessels. Hence it is said that "Wei circulates outside the vessels," meaning it moves within the skin and between muscle layers, steaming the blind membranes, and dispersing in the chest and abdomen. These are Ying and Wei Qi, originating from the same source but flowing differently. If pathogens are contracted and disrupt the qi's flow, illness occurs; if the qi flows smoothly, health is maintained. Because they do not combine with wind, cold, and dampness, they do not form Bi syndrome. Generally, Ying and Wei Qi circulate internally and externally; if obstructed by pathogens, symptoms such as fever, chills, and headache may appear. Those forming Bi syndrome result from mixed wind-cold-damp pathogens that fail to fully dissipate from the exterior, remaining stagnant in joints and Shu points, adhering to form Bi syndrome, progressing from superficial to deep, as explained above.
Huangdi asked: In Bi syndrome, some cases involve pain, others no pain, some numbness, some cold, some heat, some dryness, some dampness. What is the reason for this? Qibo replied: Pain is caused by an excess of cold; because there is cold, there is pain. Cases without pain and with numbness occur because the disease has lasted long and penetrated deeply; the circulation of Ying and Wei Qi becomes sluggish, and meridians become occasionally sparse and unblocked, resulting in no pain. The skin lacks nourishment from Ying blood, leading to numbness. Cold sensations arise because Yang qi is deficient and Yin qi is abundant, reinforcing the pathological condition, hence the feeling of cold. Heat sensations arise because Yang qi is abundant and Yin qi is deficient; the pathogenic factor prevails, and Yang is constrained by Yin, resulting in hot Bi syndrome. Profuse sweating and moisture occur because of severe exposure to dampness; Yang qi is deficient and Yin qi is excessive, and the two energies interact, causing sweating and dampness.
Human yin and yang, qi and blood each have their own predominance. Wind, cold, and dampness pathogens vary in quantity, and injuries differ in depth and location (exterior vs. interior). Therefore, symptoms are diverse. If a person has less Yang and more Yin, it reinforces the pathogen and manifests as cold; if Yang is abundant and Yin deficient, Yang is constrained by Yin, stagnating to produce heat; if dampness is heavy, there is profuse sweating, as dampness is a Yin pathogen indicating Yang deficiency. External pathogens also possess yin-yang attributes and change according to the individual's yin-yang predominance. Therefore, treatment must be based on a thorough examination of yin-yang, exterior-interior, deficiency-excess, and cold-heat.
Huangdi asked: Regarding Bi syndrome as a disease, why is there sometimes no pain? Qibo replied: When Bi affects the bones, the body feels heavy; when it affects the vessels, blood coagulates and fails to flow; when it affects the tendons, flexion occurs but extension is difficult; when it affects the flesh, there is numbness; when it affects the skin, there is cold. Possessing all five of these conditions results in no pain. Generally, Bi-type conditions become tense upon encountering cold and relaxed upon encountering heat.
The previous text stated that pain indicates excess cold. Cases without pain must indicate an excess of wind-damp pathogens. Dampness stagnates and adheres, presenting five aspects: heaviness, blood coagulation, tendon rigidity, flesh numbness, and skin cold. Therefore, possessing these five conditions, rather than excess cold, results in no pain. Generally, Bi syndrome encounters cold causing meridian tension and much pain; encounters heat causing meridian relaxation and no pain. Cold combined with dampness causes heaviness and adherence; heat combined with dampness causes profuse sweating; combined with wind, pain migrates. If migrating pain is bound by cold, it will certainly hurt; combined with dampness, it will certainly sweat. Although changes are numerous, they ultimately fall within the four categories of yin-yang and deficiency-excess.