"The large intestine is the official of transmission and transformation, from which changes emerge." — Huangdi Neijing, Linglan Midian Lun
The Huangdi Neijing likens the large intestine to the "official of transmission and transformation," whose duty is to transmit waste and expel it from the body. Once this process of "transmission" goes awry, constipation follows. When many people encounter difficulty with bowel movements, their first reaction is to reach for a laxative or an enema. In the short term, there may seem to be gradual improvement, but long-term dependence can make intestinal function increasingly "lazy." In clinical practice, people with chronic constipation who rely on laxatives or enemas often do not have a single cause—is it insufficient fluids, qi stagnation, or yang qi deficiency? Different pattern identifications call for vastly different directions of care.
Fluid Depletion and Intestinal Dryness: The Intestines Have "No Water to Float the Boat," and Laxatives Further Damage Fluids
If, during a bowel movement, the stool feels dry and hard like sheep droppings, or even requires straining, and is accompanied by dry mouth and throat, dry skin, a red tongue with little coating, and similar signs, then the constipation is very likely due to depletion of fluids. In traditional Chinese medicine, it is said that "fluids and blood share the same source." When fluids are insufficient, the intestines lose their moistening nourishment, just as when a riverbed dries up, boats cannot move. At this point, if laxatives are used indiscriminately, they will instead accelerate the loss of fluids in the body, creating a vicious cycle of "the more you purge, the drier you become."
In clinical practice, this type of constitution is relatively common among people who live in dry environments for long periods or among older individuals. For care, one may appropriately increase foods rich in moisture, such as pears, water chestnuts, and silver ear fungus, but attention must be paid to whether the spleen and stomach can transform and transport them. If abdominal distention and poor appetite are also present, it may belong to spleen deficiency failing to distribute fluids, and simply supplementing water will have limited effect. Traditional Chinese medicine holds that the approach of "increasing fluids to float the boat" is more suitable for this type of constitution, but the specific plan must be determined by a licensed Chinese medicine practitioner after pattern identification. Do not apply it on your own.
Qi Stagnation and Bowel Excess: The Intestines Have "Insufficient Motive Force," and Enemas Treat Only the Symptoms, Not the Root
Another common situation is this: although there is an urge to defecate, evacuation is not smooth, defecation is laborious, and there may even be a sensation of anal heaviness yet incomplete emptying. Such people often have abdominal fullness, frequent belching, and worsening symptoms when they are tense or under great pressure. This is mostly related to qi stagnation—the liver governs free coursing, and if emotions are not smooth, or if one sits for long periods and moves little, qi movement becomes blocked in the intestines, weakening the function of "transmission and transformation." Although an enema can temporarily stimulate defecation, it cannot resolve the root problem of qi stagnation.
How can you tell whether you tend toward qi stagnation? If the stool is not dry and hard, but the process of defecation is unusually difficult, and is accompanied by chest tightness and distending pain in the ribside regions, then the possibility of qi stagnation is greater. TCM theory points out that "when qi moves, blood moves; when qi stagnates, blood stasis occurs." Long-term qi stagnation may also affect the movement of qi and blood. For care, appropriate activity such as walking and Baduanjin can help free the qi movement, but vigorous exercise should be avoided. Some foods, such as radish and finger citron, may help regulate qi to a certain degree, but if the constitution tends toward deficiency, excessive qi-moving may instead consume qi, so the trade-offs should be weighed under a physician's guidance.
Yang Deficiency and Cold Coagulation: The Intestines "Lack Warmth," and Warming and Unblocking Is the Key
There is also another type of constipation whose symptoms are that although the stool is not dry and hard, the interval between bowel movements is long, perhaps once every several days, and it is accompanied by aversion to cold and fear of chilliness, cold limbs, cold and painful lower abdomen, and a preference for warmth and pressure. This belongs to insufficiency of yang qi with cold coagulating in the intestines. Chinese medicine holds that "yang qi is like the sky and the sun." Yang qi is like the sun in the sky, able to warm the viscera. When yang qi is weak, intestinal peristalsis becomes slow, just as in winter when river water freezes and the flow stalls. At this point, if bitter and cold laxatives are used, it is like adding frost to snow.
In clinical practice, yang deficiency constipation is relatively common among the elderly and frail or among people who have long craved cold foods and drinks. For care, appropriately consuming warm-natured foods such as ginger and mutton soup may be somewhat helpful, but attention must be paid to whether yin deficiency with dry heat is also present. If dry mouth and night sweats coexist, it may be dual deficiency of yin and yang, and simple warming supplementation may cause internal heat. Traditional Chinese medicine emphasizes that "the cold should be treated with warmth," but whether specifically to warm and supplement spleen yang or kidney yang requires a licensed Chinese medicine practitioner to make a comprehensive judgment based on the tongue and pulse.
General Recommendations: Break Dependence and Start from "Nourishing"
Regardless of the type of constipation, long-term reliance on laxatives or enemas will weaken the intestines' ability to defecate on their own. In clinical practice, some people may simultaneously have multiple factors, such as both fluid depletion and qi stagnation, or yang deficiency complicated by dampness. During pattern identification, it is first necessary to distinguish whether "deficiency" or "excess" predominates, because the directions of regulation differ between the two.
To care for the intestines, one may begin by adjusting lifestyle habits: try to defecate at regular times and avoid squatting for long periods or straining; appropriately increase dietary fiber, but note that if the spleen and stomach are weak, excessive coarse fiber may instead worsen abdominal distention. In terms of exercise, persisting in daily walking or gentle abdominal massage can help promote intestinal peristalsis. However, it must be made clear that these methods serve only as daily care and cannot replace professional diagnosis and treatment. If constipation does not improve over the long term, or is accompanied by abnormalities such as abdominal pain or blood in the stool, it is advisable to promptly consult a licensed Chinese medicine practitioner at a formal medical institution.
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Frequently Asked Questions
1. Why is it that for the same constipation, some people need warming supplementation while others need clearing and purging?
Because the patterns of constipation differ. Yang deficiency constipation is "cold" and requires warming and unblocking, whereas excess heat constipation is "heat" and requires clearing and purging. Chinese medicine emphasizes "treating the same disease with different methods," and the key lies in clearly identifying the constitution and cause.
2. Are eating bananas and drinking honey water really useful for constipation?
For some people with fluid depletion and intestinal dryness, they may be somewhat helpful, but if the condition belongs to qi stagnation or yang deficiency, the effect is limited. Bananas are cool in nature, and people with yang deficiency may experience worsened cold coagulation after eating them; honey water is high in sugar, so people with diabetes should be cautious.
3. Will long-term reliance on enemas produce dependence?
Yes. Enemas trigger the defecation reflex by stimulating the rectal wall. Long-term use may reduce the intestines' sensitivity to defecation signals, leading to a vicious cycle in which "if you do not use it, you do not go."
4. How does Chinese medicine distinguish between "constipation" and "difficulty with defecation"?
Constipation mainly refers to a long interval between bowel movements and dry, hard stool, whereas difficulty with defecation refers to having the urge but poor evacuation. The two may have different pathomechanisms and require separate pattern identification.