How Does Chinese Medicine Treat IBS?

When someone comes to me with irritable bowel syndrome, they have usually been told two things: the tests are normal, and it is probably stress. Both statements are true as far as they go. Chinese medicine goes further. It reads IBS as a pattern, most often a disharmony between the liver and the spleen sitting on top of weak spleen qi, and that old reading lines up closely with what modern research now calls the gut-brain axis.

What is IBS in Chinese medicine?

In Chinese medicine, IBS is not one disease. It is a group of patterns that share the same symptoms: abdominal pain or cramping, bloating, and bowels that swing toward diarrhea, constipation or both. Classical texts filed these complaints under headings like diarrhea, abdominal pain and constraint, and each heading pointed to an organ system that had fallen out of step.

Modern gastroenterology has moved in the same direction. The Rome IV committee, which writes the diagnostic criteria doctors use, now describes IBS and its relatives as disorders of gut-brain interaction. They list the parts that go wrong together: motility, visceral hypersensitivity, altered immune and mucosal function, a changed gut microbiota and altered processing in the central nervous system.^[1] That is a long way from “it is all in your head.” It says the gut and the brain are one system, and IBS is that system running out of rhythm.

Chinese medicine has said this for a very long time, in its own language. In my Gut Brain Synchrony community I spend a lot of time on this bridge, because once people see the pattern their symptoms stop feeling random.

The pattern question matters in practice. In a cross-sectional study of 383 IBS patients at a Guangzhou teaching hospital, 291 were diagnosed with liver depression and spleen deficiency, far more than any other pattern. Other groups were liver qi stagnation, damp-heat in the spleen and stomach, and spleen deficiency with dampness.^[2] In other words, the two ideas in my video are not a theory I picked. They are what the clinic sees.

What is liver-spleen disharmony?

Liver-spleen disharmony means the liver's job of keeping everything moving has turned into pressure on digestion. In Chinese medicine the liver is not only the organ under your ribs. It governs the smooth flow of qi through the whole body, and it is the organ most affected by frustration, worry and held-in stress. The spleen, paired with the stomach, transforms food into usable energy and moves it where it needs to go.

When the liver's qi gets tight, it presses on the spleen. The classical phrase is “wood overacting on earth.” You feel it as cramping that eases after a bowel movement, urgency when you are anxious, a gut that reacts to a hard day at work more than to anything you ate, and a sighing, clenched quality to the whole picture.

The formula built for this pattern

There is a classical prescription written for exactly this picture: Tong Xie Yao Fang, the “important formula for painful diarrhea.” It has four herbs: bai zhu to strengthen the spleen, bai shao to soften the liver and ease cramping, chen pi to move qi, and fang feng to settle the gut. A 2022 systematic review pooled eleven randomized trials of the standard formula in 985 adults with diarrhea-predominant IBS. It found better global symptom improvement than placebo or Western medication, better stool consistency, frequency and pain scores than placebo, and better quality of life and relief of anxiety than Western medication.^[3] A separate meta-analysis of modified versions of the formula, 23 trials and 1,972 patients, reported a pooled odds ratio of 4.04 for clinical response compared with routine drug treatment, with lower scores for abdominal pain, diarrhea and stool frequency.^[4]

I find that relief of anxiety interesting. A formula meant to stop the liver bullying the spleen also calmed the mind. That is the liver-spleen idea and the gut-brain idea describing the same event.

What are the symptoms of spleen qi deficiency?

Spleen qi deficiency is the second pattern, and it often sits underneath the first. Here the problem is not tension but weakness. The digestive fire is low, so food is not fully transformed, and what is not transformed turns into dampness. The signs are consistent:

This pattern is less dramatic than the liver picture, and it is why some people with IBS feel drained as well as uncomfortable. Researchers have tried to find the biology behind it. A Tsinghua University network study mapped spleen qi deficiency to modules of innate immune and oxidative stress activity, and found those modules disturbed in patients with IBS and chronic gastritis. Their conclusion was that the pattern is closely tied to an under-powered immune response.^[5]

If a lot of your bloating shows up even when your diet is clean, I wrote about that side of the spleen in Why Am I Bloated When I Eat Healthy?

Is IBS caused by stress? What the gut-brain axis shows

Stress is part of IBS, and the traffic runs both ways. That is the most important thing the gut-brain research has shown, and it is the modern version of liver-spleen disharmony.

Brain to gut

In an Australian population study that followed people for twelve years, higher anxiety at the start predicted new functional gut disorders later, and in IBS both anxiety and depression at baseline predicted IBS at follow-up.^[6] In the lab, the stress hormone CRH shows how. When Japanese researchers gave CRH to IBS patients and healthy controls, the IBS group had a larger ACTH stress response, men with IBS had bigger increases in colonic motility, and women with IBS showed lower resting parasympathetic tone.^[7] A stressed brain makes a reactive bowel. In Chinese medicine terms, the liver is pressing on the spleen.

Gut to brain

The same research group then asked which comes first. In a one-year study of 1,900 people, they calculated that in about one third of cases a mood disorder came before the gut disorder, and in two thirds the gut disorder came first and the anxiety or low mood followed.^[8] A weak, irritated gut sends distress signals upward. That is spleen deficiency feeding back on the mind.

It is no surprise, then, that a meta-analysis of 73 studies found anxiety symptoms in 39.1 percent of people with IBS and depressive symptoms in 28.8 percent, about three times the odds of people without IBS.^[9] The gut microbiota sits in the middle of this loop. A review in the Journal of Clinical Investigation describes microbes influencing stress and pain systems and brain chemistry, while the brain in turn alters microbial composition through the autonomic nervous system.^[10] And a 2026 review in the American Journal of Chinese Medicine put the two languages side by side, reading “liver depression and spleen deficiency” as the clinical face of gut-brain axis dysfunction, and describing how formulas like Tong Xie Yao Fang and Si Ni San, along with acupuncture and moxibustion, act on the microbiota, the gut barrier and inflammation.^[11]

So when someone tells you IBS is “just stress,” the better answer is that IBS is a loop. You can enter it from the mind or from the gut, and good treatment works on both ends at once.

Can Chinese medicine help IBS?

Yes, and some of the best evidence is older than most people realize. In 1998 the Journal of the American Medical Association published a double-blind, placebo-controlled trial of Chinese herbal medicine in 116 IBS patients. They took either an individualized formula written by a Chinese herbalist, a standard formula, or placebo, for sixteen weeks. Both herbal groups improved significantly more than placebo on bowel symptom scores, global improvement and how much IBS interfered with life, as rated by both patients and gastroenterologists. Fourteen weeks after treatment stopped, only the individualized group was still holding its gains.^[12]

That last detail is the whole argument for pattern diagnosis. A formula fitted to your pattern does not just quiet symptoms. It changes the terrain enough that the change lasts.

Acupuncture

Acupuncture works on the same loop through the nervous system. In a multicenter trial at seven hospitals in China, published in Mayo Clinic Proceedings, 531 IBS patients were randomized to eighteen acupuncture sessions over six weeks or to standard medication: polyethylene glycol for constipation-type IBS or pinaverium for diarrhea-type. Symptom severity scores fell by 123.5 points with acupuncture against 94.7 with medication, and the benefit lasted through twelve weeks of follow-up.^[13] Points like Zusanli (ST36) on the shin and Tianshu (ST25) beside the navel are the classical way to strengthen the spleen and regulate the intestines.

How to support IBS the Chinese medicine way

Herbs and needles are the strong tools. Daily rhythm is the foundation that lets them work. These are the habits I start with for both patterns.

For the bigger map of how digestion, food and sleep connect, start with Digestive Health: Start Here.

Questions people ask about IBS and Chinese medicine

Does acupuncture help IBS?

Yes. In a trial of 531 patients across seven hospitals, six weeks of acupuncture lowered IBS symptom scores more than standard medication, and the effect held for twelve weeks afterward.^[13]

What Chinese herbs are used for IBS?

For the liver-spleen pattern the classic is Tong Xie Yao Fang: bai zhu, bai shao, chen pi and fang feng. For spleen qi deficiency with dampness, practitioners often reach for Shen Ling Bai Zhu San, a formula built to strengthen the spleen and stop loose stools. The right one depends on your pattern.

Is IBS only caused by stress?

No. Stress can start it, but in about two thirds of people the gut problem comes first and the anxiety follows.^[8] That is why Chinese medicine treats the liver and the spleen together.

Your gut is not broken. It is out of rhythm, and rhythm can be restored.

— Brehan Crawford, L.Ac.

References

1. Drossman DA. Functional gastrointestinal disorders: history, pathophysiology, clinical features and Rome IV. Gastroenterology. 2016. doi:10.1053/j.gastro.2016.02.032
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3. Liang SB, Cao HJ, Kong LY, et al. Systematic review and meta-analysis of Chinese herbal formula Tongxie Yaofang for diarrhea-predominant irritable bowel syndrome. Front Pharmacol. 2022;13:904657. doi:10.3389/fphar.2022.904657
4. Dai YK, Li DY, Zhang YZ, et al. Efficacy and safety of Modified Tongxie Yaofang in diarrhea-predominant irritable bowel syndrome management: a meta-analysis of randomized, positive medicine-controlled trials. PLoS One. 2018;13(2):e0192319. doi:10.1371/journal.pone.0192319
5. Wang X, Wu M, Lai X, et al. Network pharmacology to uncover the biological basis of spleen qi deficiency syndrome and herbal treatment. Oxid Med Cell Longev. 2020;2020:2974268. doi:10.1155/2020/2974268
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7. Kano M, Muratsubaki T, Van Oudenhove L, et al. Altered brain and gut responses to corticotropin-releasing hormone (CRH) in patients with irritable bowel syndrome. Sci Rep. 2017;7(1):12425. doi:10.1038/s41598-017-09635-x
8. Koloski NA, Jones M, Talley NJ. Evidence that independent gut-to-brain and brain-to-gut pathways operate in the irritable bowel syndrome and functional dyspepsia: a 1-year population-based prospective study. Aliment Pharmacol Ther. 2016;44(6):592-600. doi:10.1111/apt.13738
9. Zamani M, Alizadeh-Tabari S, Zamani V. Systematic review with meta-analysis: the prevalence of anxiety and depression in patients with irritable bowel syndrome. Aliment Pharmacol Ther. 2019;50(2):132-143. doi:10.1111/apt.15325
10. Mayer EA, Tillisch K, Gupta A. Gut/brain axis and the microbiota. J Clin Invest. 2015;125(3):926-938. doi:10.1172/JCI76304
11. Yu A, Bi Y, Xu X. Brain-gut axis perspective on irritable bowel syndrome: the role of gut microbiota and therapeutic strategies of traditional Chinese medicine. Am J Chin Med. 2026;54(7):2093-2122. doi:10.1142/S0192415X26500771
12. Bensoussan A, Talley NJ, Hing M, et al. Treatment of irritable bowel syndrome with Chinese herbal medicine: a randomized controlled trial. JAMA. 1998;280(18):1585-1589. doi:10.1001/jama.280.18.1585
13. Pei L, Geng H, Guo J, et al. Effect of acupuncture in patients with irritable bowel syndrome: a randomized controlled trial. Mayo Clin Proc. 2020;95(8):1671-1683. doi:10.1016/j.mayocp.2020.01.042
14. Bavani NG, Hajhashemy Z, Saneei P, et al. The relationship between meal regularity with irritable bowel syndrome (IBS) in adults. Eur J Clin Nutr. 2022;76(9):1315-1322. doi:10.1038/s41430-022-01108-3