From one to three in the morning, the Chou hour. The qi and blood of the liver meridian are in command, and this should be a time of restful sleep when "lying down brings the blood back to the liver." If at this moment a throbbing sensation arises deep in the upper abdomen and both flanks—like something gently knocking on a door within the belly, or like a tiny rhythm wandering through the vessels—is it a knock from liver qi stagnation, or an echo triggered by disharmony of the spleen and stomach?
I. Qi Stirring at the Chou Hour: The Liver Meridian Pathway and the Origin of "Throbbing"
The "throbbing" of "throbbing pain," in the view of Chinese medicine, is an expression of a "wind sign" or "qi movement." It differs from needle-like stabbing pain, and also from the dull pain of distention; rather, it is a rhythmic discomfort with a pulsating quality, making one distinctly feel a current of qi surging within the body.
The Huangdi Neijing · Suwen · Chapter 22: Discourse on the Methods of Treating Diseases According to the Seasonal Qi of the Viscera states: "In liver disease, pain below both flanks extends to the lower abdomen, making the person prone to anger." This is an early description in the classics attributing hypochondriac pain to pathological changes of the liver meridian. Its meaning is that when the liver becomes diseased, pain commonly occurs in both hypochondriac regions, and this pain can radiate to the lower abdomen, while the person is simultaneously prone to irritability and anger. This corresponds closely in location to the throbbing pain of the upper abdomen and both flanks discussed in this article.
Next, consider the Lingshu · Chapter 10: Meridians: "The foot Jueyin liver vessel... reaches the lower abdomen and spreads through the hypochondrium." The liver meridian ascends from the lower abdomen and distributes through the hypochondriac region. During the Chou hour, qi and blood flow into the liver meridian; liver qi, which should be gathering and storing, instead becomes restless, and this unsettled movement of qi "knocks" along its pathway at the upper abdomen and both flanks.
But here we must pause and consider a core question: if both the upper abdomen and both flanks throb with pain, must the problem necessarily lie in the liver? And if it is the liver, why does it manifest specifically during the Chou hour? If one says that the Chou hour is when the liver meridian is in command, then why is there no similar discomfort during the Si hour (9 to 11 a.m.), when the spleen meridian is in command? It is precisely this temporal specificity that suggests a struggle between the liver and spleen. The liver governs free coursing, the spleen governs transformation and transportation; when liver qi is depressed, it rebels horizontally and attacks the spleen, and when spleen earth is deficient, liver wood more easily invades—the two viscera serve as cause and effect for each other. Clinically, this type of presentation is mostly seen in people who are ordinarily prone to anxiety and tension and whose daily routines are irregular.
II. The Pivot of Shaoyang: Qi Binding in the Middle and Floating Outward to the Flanks
Article 96 of the Treatise on Cold Damage describes Shaoyang disease as follows: "After five or six days of cold damage, with wind strike, alternating chills and fever, bitter fullness in the chest and hypochondrium, silence and unwillingness to eat, vexation and frequent vomiting... Minor Bupleurum Decoction governs it." The "bitter fullness in the chest and hypochondrium" spoken of by Zhang Zhongjing refers to a sensation primarily of distention and discomfort in the chest and hypochondriac region, as if something were stuffed there—a typical manifestation of dysfunction of the Shaoyang pivot. The Shaoyang meridian runs along the lateral aspect of the body, passing directly through both flanks; and the word "bitter" in "bitter fullness" points out that this is a stuffy, blocked sensation the patient finds hard to endure. It is not entirely the same as the sensation of "throbbing pain," but the disease location belongs to the same hypochondriac region, and the pathogenesis similarly involves the free movement of qi.
What is the plain-language essence of this passage? Pathogenic factors invade the half-exterior, half-interior region of Shaoyang; the pivot's transportation fails, and qi becomes bound in the chest and hypochondrium. The liver and gallbladder are interior-exterior paired; when gallbladder qi is not comfortable, liver qi is not freely coursing, and depressed qi congests in both flanks, manifesting as stuffiness, distention, fullness, and pain. If at this time a "throbbing" sensation also appears in the upper abdomen, it indicates that qi stagnation has already affected the middle burner's spleen and stomach—wood depression attacks earth, stomach qi is enveloped by depressed qi, forming a pulsation-like rhythm. It is worth considering that if there is only fullness without a throbbing sensation, it is mostly simple qi stagnation and still relatively easy to relieve; once throbbing appears, it often means that qi depression has persisted for some time and there are early signs of internal stirring from depression transforming into wind.
Since "throbbing" belongs to the category of wind signs, one cannot help but wonder: is this wind a genuine internal stirring of wind in the body, or is it a transmission to the body surface of the pulsation of abundant qi and blood? From the perspective of disease tendency, if the throbbing pain is severe and worsens with pressure, it tends toward a excess pattern of qi depression transforming into fire; if the throbbing is faint, comes and goes, and eases with pressure, it tends toward a deficiency pattern of qi and blood failing to nourish. Clinically, the two directions differ: the former should be treated by coursing and dispersing, the latter by nourishing and softening.
III. Earth Deficiency with Wood Overacting: The Spleen's Home Territory and the Liver's Guest Residence
The center of the upper abdomen is the stomach duct region, territory governed by spleen earth; both flanks are the region traversed by the liver meridian. When liver qi is excessive and the spleen and stomach are weak, producing the posture of "wood overacting on earth," the upper abdomen and both flanks simultaneously become the battlefield of qi movement. The core point of differentiation here is: where does the throbbing pain predominate? If the stomach duct region predominates and the hypochondrium is secondary, it is spleen-stomach qi deficiency with liver wood disturbing it; if the throbbing and shooting in both flanks is obvious while the stomach duct region is relatively mild, the emphasis is on liver qi's own depression.
In the Jingui Yaolue · Chapter One: Pulse, Syndrome, and Treatment of the Viscera, Meridians, and Their Sequential Diseases, there is an extremely key statement: "Seeing disease of the liver, know that the liver transmits to the spleen; one should first fortify the spleen." This is Zhang Zhongjing's incisive reminder regarding the liver-spleen relationship. Its meaning is not difficult to understand: when seeing pathological changes of the liver, one should know that liver qi most easily transmits to and attacks spleen earth, so when addressing liver problems, one should first protect the spleen and stomach. Viewed through this lens, the essence of throbbing pain in both the upper abdomen and both flanks falls precisely on this relationship between liver and spleen—since liver wood is already hyperactive, has spleen earth already lost its defense?
Clinically, if the throbbing pain is accompanied by poor appetite, postprandial stuffiness and fullness, and loose, sticky stools, it often indicates that spleen earth has indeed become "deficient and unable to withstand attack"; if the throbbing pain is accompanied by bitter taste in the mouth, dry throat, and shallow sleep with many dreams, it tends toward liver-gallbladder depressive heat. These two situations also differ in tongue presentation—the former shows teeth marks on the tongue edges with a thin white coating, the latter shows a reddish tongue edge with a thin yellow coating.
It must be particularly pointed out here: throbbing pain is not always the result of "liver qi being too strong." Another possibility is precisely the opposite—prolonged spleen-stomach deficiency, with the middle burner's transformation and transportation lacking strength, causing the ascending and descending of qi movement to lose its foundation, so that liver qi instead floats upward to the flanks because spleen qi is too weak to restrain it. If this is the case, the root lies in spleen deficiency rather than liver depression, and the two directions of regulation are entirely different. If one mistakenly assumes both are liver depression and indiscriminately courses and disperses, spleen earth may become even more deficient, and the throbbing pain may instead worsen. This is precisely where the dialectical essence of Chinese medicine's "treating the same disease differently" lies.
IV. Understanding the Body Through the Rhythm of Time, and Discerning Direction Through the Movement of Qi and Blood
Returning to the Chou hour as a time node, we can analyze the nature of the throbbing in greater detail. The Chou hour is when the liver meridian is in command, the time when liver blood is being stored and liver qi is gathering inward. If at this time the movement of qi and blood does not follow its normal course, and depressed qi collides and pulsates within the meridians, then a subjective throbbing sensation appears. If the throbbing is forceful and makes it difficult to sleep due to vexation, it mostly suggests depressive fire; if the throbbing is weak, as if present and yet not, accompanied by fatigue, then dual deficiency of qi and blood with loss of nourishment of the sinews and vessels is more likely.
The Suwen · Chapter Nine: Discourse on the Manifestations of the Viscera According to the Six Sections also says: "The liver is the root of endurance, the dwelling place of the hun." "Root of endurance" means the foundation of tolerance for fatigue, indicating that the liver is closely related to the body's tolerance of external pressure. Long-term late nights, excessive fatigue, and repressed emotions all slowly deplete this "root of endurance." As liver blood gradually becomes insufficient, liver qi loses its nourishment and floats upward; when liver qi is depressed for a long time, it in turn hinders the spleen and stomach's function of receiving and transforming. The throbbing of the upper abdomen and both flanks is thus perceived by the body amid the interweaving of these two negative cycles.
Daily care can be approached from four dimensions: diet, rest, emotions, and exercise. In diet, meals should be regular, eaten slowly and chewed thoroughly, with reduced intake of raw, cold, greasy, and irritating foods, and moderate consumption of foods that help harmonize liver and spleen, such as Chinese yam, lotus seed, and jujube, with gentleness as the standard. In rest, one should certainly be asleep during the Chou hour; if night shifts are possible, one should still try to arrange a fixed compensatory sleep period during the day. In emotions, it is helpful to set aside a few minutes of quiet solitude during the day, giving tense thoughts an "exhaust vent." In exercise, one may choose gentle methods that harmonize body and mind, such as walking, Baduanjin, or Taijiquan, but the specific regimen should be determined by a licensed Chinese medicine practitioner according to individual constitution.
In the final analysis, throbbing pain in the upper abdomen and both flanks is a signal the body sends at a specific time, and also a reminder that the balance between liver and spleen has been lost. It reminds us: the free coursing of liver qi needs direction, and the transformation and transportation of spleen earth needs a foundation. If one is frequently awakened by this throbbing during the Chou hour, it may be worth examining oneself—have daytime emotions been suppressed for too long? Are the three meals regular and gentle? Has sleep truly entered a stable depth? These seemingly ordinary aspects of lifestyle, accumulated over time, are precisely the contract between liver and spleen.
Have you ever considered that a burst of throbbing at the Chou hour may not only be a problem of the liver and gallbladder? It may be another hint issued by the spleen and stomach in silence—the liver and spleen are originally a pair of companions who share joys and hardships, and when they fall out of balance, someone must speak first.
References:
1. The original text of the Huangdi Neijing · Suwen can be consulted in the Chinese medical ancient texts database: https://tcmdata.cintcm.com/
2. World Health Organization strategy documents on traditional medicine: https://www.who.int/health-topics/traditional-complementary-and-integrative-medicine
3. Official website of the National Administration of Traditional Chinese Medicine: https://www.satcm.gov.cn/
Related Knowledge Q&A
I. What causes qi stirring at the Chou hour along the liver meridian pathway?
Chinese medicine holds that qi stirring at the Chou hour along the liver meridian pathway must be approached through holistic pattern differentiation, using the four examinations—inspection, listening and smelling, inquiry, and palpation—in combination, and integrated with individual constitutional characteristics for comprehensive judgment; it cannot be generalized. The specific direction of regulation must be determined by a licensed Chinese medicine practitioner after an in-person consultation.
II. How long is the regulation cycle for qi binding at the Shaoyang pivot?
The regulation cycle varies from person to person and is related to factors such as individual constitutional foundation and the degree of cooperation with lifestyle habits. Chinese medicine emphasizes gradual, step-by-step progress; the specific cycle must be assessed by a licensed Chinese medicine practitioner after an in-person consultation based on individual circumstances. This material does not provide commitments regarding specific cycles.
III. What should be noted in daily life for earth deficiency with wood overacting and the spleen's home territory?
For daily care, it is recommended to maintain regular rest, a balanced diet, moderate exercise, and emotional stability. Specific precautions should be flexibly adjusted according to individual constitution and seasonal changes; one may consult a licensed Chinese medicine practitioner for targeted advice.