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THERAPIES & TRADITIONS · GUIDE

TCM for Reflux, Constipation and Diarrhea: Evidence

What trials and reviews found for acupuncture and Chinese herbal formulas used for acid reflux, constipation and diarrhea, with the warning signs that call for a doctor.

Content last updated . This page has not been medically reviewed.

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Traditional explanations, briefly

TCM practitioners describe digestive complaints through traditional patterns, for example ideas about the "spleen" and "dampness", which are frameworks and not anatomy. See Dampness, Spleen and Digestive Fire. A formula chosen for a pattern is a different thing from a drug tested for reflux. The studies below report what was measured.

What research found

Condition and interventionWhat the source foundStrength of evidence
Chronic severe functional constipation: electroacupunctureA sham-controlled trial of 1,075 people at 15 hospitals in China found 1.76 more complete spontaneous bowel movements a week with electroacupuncture versus 0.87 with sham over 8 weeks; side effects were mild or transient. Acupuncturists could not be blinded. It was funded by China's Ministry of Science and Technology. [4] A meta-analysis of 6 studies (1,457 people) agreed, noting the effect decreased by week 12 of follow-up and that results varied with point selection, needle depth and intensity. [5]Promising but limited
Constipation: MaZiRenWan (Hemp Seed Pill) herbal formulaA review of 17 trials (1,681 people), all in East Asia and at moderate to high risk of bias, found two high-quality placebo-controlled trials with an increase of about 1 bowel movement a week; the authors said trials outside East Asia are needed. [6]Promising but limited
GERD (reflux disease): acupunctureA review of 12 trials (1,235 people) found acupuncture added to Western medicine improved overall symptoms more than Western medicine alone; the authors cited small samples and poor methods. [7]Promising but limited
Refractory GERD: Chinese herbal formulas as add-onA network meta-analysis of 19 trials comparing 16 formulas found better clinical efficacy and recurrence rates than conventional medicine alone, with no serious adverse events; the authors urged better-quality trials. [8]Promising but limited
Non-erosive reflux disease: herbal medicineA review of 34 trials (3,759 people) found herbal medicine more effective than conventional therapy on several outcomes, with moderate to low quality of evidence. [9]Promising but limited
Diarrhea-predominant IBS or functional diarrhea: acupunctureA review of 31 studies (3,234 people) found acupuncture performed better than some comparison drugs, with moderate to low certainty; mild bleeding under the skin was the most common adverse reaction. [10]Promising but limited
Functional GI disorders (dyspepsia, IBS, constipation): herbal formulasA review of 49 double-blind trials (7,396 people) tested more than 33 different formulas and found benefit over placebo, but only 9 trials had low risk of bias and herbal groups tended to have more adverse events than placebo. [11]Promising but limited

Frequently asked questions

Does acupuncture work for constipation?

A large sham-controlled trial in China found more bowel movements per week with electroacupuncture for chronic severe functional constipation. [4]

Are Chinese herbal formulas proven for acid reflux?

No. Reviews of trials in reflux disease are encouraging but limited by study quality. [8][9]

Can I use a Chinese formula instead of acid-reducing medicine?

We found no source that supports replacing medicine, and you should not stop prescribed treatment without medical advice. The reviews we read looked at herbs mostly added to or compared with conventional care. [8]

Is a Chinese herbal laxative safe long term?

We found no source on long-term safety of such products. Ask a clinician, and see a doctor if constipation keeps returning or comes with blood or weight loss. [2]

When is diarrhea an emergency?

The NHS lists vomiting blood, a sudden severe headache or tummy ache, and possible poisoning among the reasons to seek emergency help. [3]

More details: evidence, limits and cautions

The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.

Warning signs first
Digestive symptoms are common, but a few signs mean see a clinician before trying anything else. The NHS advises seeing a GP if heartburn happens most days, if lifestyle changes and pharmacy medicines are not helping, or if heartburn comes with food sticking in the throat, frequent vomiting or unexplained weight loss. [1] For constipation, it lists blood in the stool, weight loss without trying, constipation that is not improving with treatment, and sudden changes in bowel habits. [2] For diarrhea and vomiting, it says to get emergency help for vomiting blood or vomit that looks like coffee grounds, a sudden severe headache or severe tummy ache, or if you may have swallowed something poisonous. [3] In the US, call 911 for emergencies, and Poison Help is 1-800-222-1222.

This page is information only. It does not suggest stopping any prescribed medicine, including acid-reducing medicines. For background see Heartburn and Reflux, Constipation and Diarrhea. For irritable bowel syndrome and bloating, see TCM for IBS, Bloating and Other Digestive Complaints.

How to read these results
  • Most positive findings are for specific formulas or specific acupuncture protocols, not for "TCM" in general. A result for one formula does not apply to another.
  • Many reviews include trials compared with "usual medicine" without a placebo, and herbs and acupuncture can be shaped by expectation. The best-controlled result on this page is the sham-controlled electroacupuncture trial for severe constipation. [4]
  • A review of herbal medicines for functional digestive disorders included only trials that were double-blind and still found more adverse events in herbal groups than in placebo groups. [11] Herbal products are not automatically milder than medicines.
  • For quality and publication-bias concerns, see Publication Bias and Positive-Result Concerns in Chinese Trials.
Safety
  • Chronic constipation, diarrhea or reflux that persists can have causes that need a medical check, as the NHS warning signs above show. [2][1]
  • Ask a doctor or pharmacist about interactions, especially if you take medicines for reflux, blood thinners, or diabetes or blood pressure medicines. See Chinese Herbs and Prescription Medicines.
  • Pregnancy and children: ask a clinician before any herbal product; see Chinese Herbal Products: Quality, Contamination and Medicine Interactions.
  • With diarrhea, the most important step is staying hydrated; the NHS lists signs of dehydration that need urgent advice, especially in babies and young children. [3]
References
  1. NHS. Heartburn and acid reflux. Read 2026-10-22.
  2. NHS. Constipation. Read 2026-10-22.
  3. NHS. Diarrhoea and vomiting. Read 2026-10-22.
  4. Liu Z, Yan S, Wu J, et al. Acupuncture for chronic severe functional constipation: a randomized trial. Ann Intern Med. 2016;165(11):761-769. Read 2026-10-22.
  5. Zhang N, Hou L, Yan P, et al. Electro-acupuncture vs. sham electro-acupuncture for chronic severe functional constipation: a systematic review and meta-analysis. Complement Ther Med. 2020;54:102521. Read 2026-10-22.
  6. Yang M, Feng Y, Zhang YL, et al. Herbal formula MaZiRenWan (Hemp Seed Pill) for constipation: a systematic review with meta-analysis. Phytomedicine. 2021;82:153459. Read 2026-10-22.
  7. Zhu J, Guo Y, Liu S, et al. Acupuncture for the treatment of gastro-oesophageal reflux disease: a systematic review and meta-analysis. Acupunct Med. 2017;35(5):316-323. Read 2026-10-22.
  8. Zhang R, Yang Z, Pan X, et al. The positive role of Chinese herbal medicine as an adjunctive therapy for refractory gastroesophageal reflux disease: a systematic review and network meta-analysis. Medicine (Baltimore). 2025;104(21):e42565. Read 2026-10-22.
  9. Kim M, Park C, Park JW, Kim J, Ko SJ. Herbal medicine for the treatment of non-erosive reflux disease: a systematic review and meta-analysis. Medicine (Baltimore). 2024;103(45):e40269. Read 2026-10-22.
  10. Guo J, Xing X, Wu J, et al. Acupuncture for adults with diarrhea-predominant irritable bowel syndrome or functional diarrhea: a systematic review and meta-analysis. Neural Plast. 2020;2020:8892184. Read 2026-10-22.
  11. Tan N, Gwee KA, Tack J, et al. Herbal medicine in the treatment of functional gastrointestinal disorders: a systematic review with meta-analysis. J Gastroenterol Hepatol. 2020;35(4):544-556. Read 2026-10-22.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.