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Chapter 27 of 81
黄帝内经·灵枢
The Yellow Emperor asked Qi Bo: When Zhou Bi (Wandering Bi-syndrome) afflicts the body, the pain moves upward and downward along the blood vessels, with upper and lower, left and right corresponding to each other, continuous and unbroken without gap. I wish to ask: does this pain arise within the blood vessels, or within the fleshy interstices (fascial spaces between muscles)? What causes it to be like this? The pain shifts extremely rapidly—so fast that one cannot even insert a needle in time; by the time the pain becomes intense and before one has determined the treatment location, the pain has already ceased. What is the principle behind this? I wish to hear the reason.
Qi Bo replied: What Your Majesty describes is Zhong Bi (Aggregating Bi-syndrome), not Zhou Bi.
The Yellow Emperor said: Please explain Zhong Bi. Qi Bo replied: The hallmark of Zhong Bi is that pain settles at distinct locations, alternately arising and alternately ceasing. When one place recovers, another arises; disease on the right affects the left, and disease on the left affects the right. However, it cannot circulate throughout the entire body in a continuous circuit—it merely alternates between eruption and remission.
The Yellow Emperor said: Good. Then how should needling treat this? Qi Bo replied: In treating this condition with acupuncture, even if the pain has already ceased, one must still needle the original location where pain arose, to prevent it from recurring.
The Yellow Emperor said: Good. Then please further explain what Zhou Bi is like. Qi Bo replied: The seat of Zhou Bi lies within the blood vessels. The pathogenic qi ascends with the blood vessels and descends with the blood vessels. It cannot wander left or right, but each has its own lodging at the corresponding location along the vessels.
The Yellow Emperor asked: How does needling treat this? Qi Bo replied: When pain travels from above downward, first needle the points below to intercept (stem) it, then needle the points above to remove (expel) the root cause; when pain travels from below upward, first needle the points above to intercept it, then needle the points below to remove it.
The Yellow Emperor said: Good. Then how does this pain arise? And why is it named "Zhou Bi"? Qi Bo replied: The three pathogenic factors of wind, cold, and dampness invade the fleshy interstices at the body's surface, compressing the fleshy interstices and generating a thin pathological fluid (mo). When this mo encounters cold, it congeals; after congealing, it displaces and separates the fleshy interstices, causing the muscle tissue to split apart. Splitting generates pain. When pain arises, the heart-spirit converges upon the painful area; when the spirit converges, heat is generated; once heat is generated, the pain is temporarily relieved. After the pain subsides, the local qi and blood circulation becomes rebellious (adversely counterflowing and obstructed); this rebelliousness then triggers the eruption of bi-syndrome pain elsewhere. Once it erupts, the entire cycle repeats.
The Yellow Emperor said: Good. I now understand the principle. This disease does not lie within the viscera and bowels internally, nor does it manifest on the skin surface externally; it dwells solely within the fleshy interstices, causing the genuine qi (the body's upright qi) to be unable to circulate throughout the body. Hence it is named "Zhou Bi." Therefore, when treating bi-syndrome with acupuncture, one must first palpate and trace along (press and follow) the six channels (the three yin and three yang channels of the hands and feet) inferior to the painful area, observe their emptiness and fullness conditions, as well as whether the major collaterals (larger branches of the channels) have accumulative obstruction, and where channels sink down due to deficiency and points are empty — and regulate and treat accordingly; use the ironing method (hot compress) to warm and unblock the channels; if there are areas of tendon-vessel spasmodic tightness and hardness, employ turning and guiding (rotating and traction) techniques to relax them.
The Yellow Emperor said: Good. I now understand the principle and know how to implement it concretely. What has been spoken above constitutes the principle by which the Nine Needles (the nine ancient needle instruments) follow the circulation of channel qi, and the diagnostic and therapeutic rules for diseases arising from yin-yang imbalance of the twelve channels.
The central thrust of this chapter lies in distinguishing the disease location, pathogenesis, and treatment methods between "Zhong Bi" and "Zhou Bi," from which emerges the needling strategy of "intercept first, then remove."
Zhong Bi vs. Zhou Bi — Disease Location Determines Manifestation:
The seat of Zhong Bi is within the fleshy interstices; pain is "each in its own location," corresponding left and right, alternately arising and ceasing, but unable to circulate throughout the body. The seat of Zhou Bi is within the blood vessels; pain "moves with the vessels upward and downward," traveling along the channel pathways, but unable to move left and right. The most essential distinction between the two lies in the differing tissue levels where pathogenic qi resides (muscular fascia vs. blood vessels), which determines how the pain manifests in its travel. This embodies the consistent principle of the Spiritual Pivot: "Disease location determines disease manifestation" — know where the disease resides, and you will know how it will present.
The Pathological Closed Loop: "Mo accumulation—splitting—pain—spirit convergence—heat—pain relief—rebelliousness—recurrence":
This is the most exquisite medical reasoning in the chapter. Wind-cold-damp pathogens → compress the fleshy interstices → generate mo (pathological exudate) → congeal upon encountering cold → displace and split the muscles → pain → heart-spirit converges at the painful site → local heat generation → temporary pain relief → but local qi and blood become rebelliously obstructed → triggers bi-pain elsewhere → the cycle repeats. This chain explains two key phenomena: first, why bi-pain alternates between eruption and remission (pain relief is not recovery, but a prelude to rebellious transfer); second, why pain wanders (once local qi and blood are obstructed, the problem transmits along the channels to other locations). This is not simply "treat the pain where it hurts," but rather a dynamic cycle that treatment must interrupt.
The Sequential Strategy of "Intercept First, Then Remove":
The core idea of the treatment method is to stem the pathogenic momentum, then eliminate the root cause. When pain descends downward, first needle below to "intercept it" (like building a dam to stem the flood's downstream momentum), then needle above to "remove it" (dispel the pathogen at its source); the reverse applies in the opposite case. This embodies the TCM treatment principle of "follow the momentum, sever the transmission" — not chasing after the pain, but discerning the direction of pathogenic flow, first cutting off its path of progress, then clearing its source.
"Genuine Qi Unable to Circulate" Is the True Meaning Behind the Naming of Zhou Bi:
This is an easily misunderstood point — the "Zhou" in Zhou Bi does not refer to pain "wandering throughout the body," but rather to the upright qi's inability to circulate. Pathogenic qi obstructs the fleshy interstices, preventing the genuine qi from circulating normally throughout the body — hence the name "Zhou Bi." The naming focuses on the pathogenesis (qi not circulating), not the symptoms (pain wandering).
The General Guidelines for Treating Bi: Palpating the Six Channels, Examining Deficiency and Excess, Unblocking Major Collaterals, Ironing to Unblock, Turning and Guiding:
The concluding passage offers universal treatment principles for bi-syndromes — first palpate and trace the six channels, determine deficiency and excess; locate accumulative obstruction in the major collaterals; identify sunken and deficient points; employ the ironing method to warm and unblock; apply turning and guiding techniques to areas of tendon-vessel spasmodic rigidity. This represents a complete clinical pathway from diagnosis to multiple therapeutic modalities, embodying the Inner Canon's spirit of syndrome differentiation and treatment: "Drain what is in excess, supplement what is deficient, unblock what is obstructed."
The Resonance Between "Fleshy Interstices" and Modern Fascia Science:
The "fleshy interstices" mentioned in the Inner Canon roughly correspond to the fascia and the connective tissue interstices between muscles in modern anatomy. Modern fascial research has confirmed that fascia forms a body-wide continuous network containing abundant nerve endings and fluid (interstitial fluid) flow. The description of wind-cold-damp pathogens "lodging in the fleshy interstices" resulting in "mo accumulation" and pain bears a primitive analogy to modern understanding of fascial adhesion, interstitial fluid retention, and local inflammatory mediators stimulating nerve endings to produce pain. Of course, the congealing and splitting of "mo" cannot be equated with modern pathology, but it does reveal an important fact: the source of pain is not limited to fixed anatomical structures; it can also arise and be conducted at the level of soft tissue interstices.
"Pain Migration" and Fascial Referred Pain/Conduction Pain:
The pain of Zhou Bi "moving with the vessels upward and downward" can be partially mapped to modern medical concepts of referred pain or trigger point conduction phenomena in myofascial pain syndrome. Modern research has found that abnormal points (trigger points) within the fascial network can generate pain at sites distant from the original location. Though the ancients explained pain transferring from one site to another through "rebelliousness then other bi erupts" — a relatively sweeping formulation — the observation that "pain can wander and transfer throughout the body" is a valid and clinically verifiable phenomenon.
Re-examining "When the Spirit Converges, Heat Is Generated; with Heat, Pain Resolves":
The ancients believed that during pain, the heart-spirit converges at the affected site generating heat, and this heat relieves the pain. In modern understanding, local sensation of heat is more likely derived from vasodilation and increased blood flow due to inflammatory response, rather than the convergence of "spirit." However, the phenomenon that "focusing attention on a painful area alters the perception of pain" is well-recognized in modern pain psychology — attentional focus affects the subjective experience of pain. The ancients summarized this psycho-physiological interaction as "the spirit converging," demonstrating an early mind-body integrated observation, though the causal chain as literally expressed should not be taken as physiological fact.
The Reasonableness of "Ironing to Unblock" and Heat Therapy:
Employing the ironing method (hot compress) to warm and unblock the channels in treating wind-cold-damp bi-pain remains widely used in modern physical therapy — thermotherapy can promote local blood circulation, relax muscles, reduce fascial tension, and alleviate pain. This method remains effective thousands of years later, indicating that the ancients' empirical knowledge rests on a solid practical foundation.
Historical Limitations:
The chapter's descriptions of "mo" formation, congealing, and splitting are based on ancient naked-eye observation and inference, not modern anatomical or pathological empirical findings. Attributing local heat generation to "heart-spirit convergence" carries a philosophically explanatory character and should not be understood as a physiological mechanism. Furthermore, clinical recommendations such as "must needle the original site to prevent recurrence" derive from the therapeutic system of that era, and their efficacy has not been validated by modern evidence-based medicine; they should not serve as a basis for modern medical treatment.
Avoid Wind, Cold, and Dampness; Protect the Normalcy of the "Fleshy Interstices":
The root of bi-syndrome lies in wind, cold, and dampness invading the body surface. In daily life, pay attention to wind protection and warmth retention, especially at the neck, shoulders, lower back, and joints. Avoid prolonged exposure to damp, cold environments; after exercise and sweating, dry off and change clothes promptly, leaving no opportunity for cold-damp pathogens to invade.
Movement Keeps Qi Flowing; Stillness Causes Qi Stagnation:
"Genuine qi unable to circulate" is the core pathogenesis of Zhou Bi. Maintaining moderate exercise — especially stretching, daoyin (guiding and pulling), tai chi, yoga, and other activities emphasizing fascia stretching and qi-blood circulation — helps the "genuine qi" flow continuously and reduces discomfort from qi-blood stasis. Prolonged sitting and fixed postures are precisely conducive to localized qi-blood circulation impairment.
Pain Is a Signal, Not an Enemy:
The ancients observed that pain can "relocate," reminding us that bodily discomfort is often a localized manifestation of overall imbalance. When one side feels uncomfortable, do not only focus on rubbing that spot; observe whether it connects with other areas, making adjustments in lifestyle habits and overall states rather than treating symptoms in isolation.
Hot Compress to Unblock — A Safe and Simple Daily Care Practice:
"Ironing to unblock" offers a very safe, operable, non-medical care approach. For general discomfort from cold exposure or overexertion causing muscle tightness and soreness, moderate warm compresses can help relax muscles, promote circulation, and relieve tension. However, be mindful of moderate temperatures to avoid burns; if discomfort persists or worsens, consult a healthcare provider promptly.
Related Concepts:
Further Reading:
This content is based on classical Chinese medicine texts and is provided solely for traditional culture study and research purposes. It does not constitute any medical diagnosis, medication recommendation, or treatment advice. If you are unwell, please seek medical attention promptly.