Irritable Bowel Syndrome (IBS)

What is IBS?

IBS is a chronic disorder of gut-brain interaction marked by recurrent abdominal pain and altered bowel habits, including constipation, diarrhea or both.^[1] It affects roughly 5 to 10 percent of otherwise healthy people at any one time and, in most, comes and goes over the years.^[2]

Common symptoms

The core symptom is abdominal pain that is often related to bowel movements. Stools may be loose, hard or alternate between the two, and the condition is grouped by the main pattern: diarrhea (IBS-D), constipation (IBS-C) or mixed (IBS-M).^[1]

• Bloating and a feeling of fullness, which are common but not required for the diagnosis^[1]
• Gas
• Mucus in the stool
• Symptoms that flare with stress, certain foods or hormonal shifts

Causes and risk factors

The cause is not fully understood. Disordered communication between the gut and brain leads to altered gut movement, a more sensitive gut and changed processing of signals in the nervous system.^[2] Changes in gut bacteria, food intolerances and psychological factors may also contribute.^[1]

The best described risk factor is an acute gut infection. IBS is also more common in people with anxiety or depression and in young adult women.^[2]

How it is diagnosed and treated conventionally

Doctors usually diagnose IBS from your symptoms and examination, using criteria called Rome IV, with limited testing to rule out look-alike conditions.^[1] Alarm symptoms such as weight loss or rectal bleeding call for further investigation.^[2]

First-line treatment includes education and reassurance, dietary changes, fiber for constipation, and antispasmodic drugs for pain. Other medicines are chosen according to bowel pattern, and psychological therapies are used when appropriate.^{[2, 3]} A low FODMAP diet, which limits certain fermentable carbohydrates, is a second-line dietary step that guidelines say should be guided by a dietitian.^[4]

Why IBS calls for a whole-person approach

IBS has no single cause, and symptoms rarely track one factor alone. Gut movement, nerve sensitivity, food, gut bacteria and mood all appear to play a part, which is why people with the same diagnosis can respond differently to the same treatment.^{[1, 2]}

Some patients use complementary care alongside medical treatment to address several of these factors at once.

The gut-brain connection

Disordered signaling between the gut and brain is considered central to IBS and may explain both the bowel symptoms and the high rates of anxiety and depression seen with it.^{[1, 2]}

A sensitive gut

Visceral hypersensitivity, in which normal gut sensations are felt as pain, is one of the mechanisms described in IBS.^[1]

Food and gut bacteria

Food intolerances and changes in the gut microbiota are listed among the contributing factors.^[1] Dietary management, including healthy eating guidance and a supervised low FODMAP diet, is part of standard care.^[4]

Stress and mood

Psychological conditions are more common in people with IBS, and anxiety is a recognized risk factor.^[2] Psychological therapies are a recognized option for people with more severe symptoms.^[2]

Acupuncture for IBS

What the research shows

The research suggests acupuncture may help some people with IBS, but the picture is mixed. A 2025 trial at six hospitals in China randomized 280 adults with IBS-D to 15 sessions of acupuncture or sham acupuncture over 6 weeks. About 58 percent of the acupuncture group met the response target for pain and diarrhea days, compared with about 41 percent of the sham group, and the difference lasted through most of 18 weeks.^[5] A trial of 519 patients in China found acupuncture reduced symptom scores more than the medicines polyethylene glycol or pinaverium over 6 weeks, with effects lasting up to 12 weeks. This trial compared acupuncture with drugs, not with sham needling.^[6]

A 2012 meta-analysis of 17 trials (1,806 participants) found no benefit over credible sham acupuncture for symptom severity or quality of life. It did find acupuncture outperformed drug therapy in Chinese trials, and the authors noted that this could reflect patient expectations.^[7] A 2022 review of 31 trials reported that acupuncture beat drugs for symptom severity, but did not beat sham acupuncture on symptom severity, though it did on abdominal pain.^[8]

A 2025 meta-analysis of 14 trials found acupuncture improved quality of life and symptom severity compared with other treatments but did not reduce abdominal pain, and its authors called for more high-quality trials.^[9] An umbrella review of 15 systematic reviews found most favored acupuncture and moxibustion but rated their quality low or very low.^[10]

How acupuncture may work

Researchers propose that acupuncture may influence gut movement, visceral hypersensitivity, immune activity, neurotransmitters, the gut-brain axis and the gut microbiota.^[11] The review draws on both animal and clinical studies and notes that some findings conflict, so these remain proposed explanations.^[11]

What treatment involves

Treatment uses fine, sterile, single-use needles placed at points on the abdomen, limbs and sometimes the back, usually left in place for about 20 to 40 minutes. Two recent trials used 15 and 18 sessions over 6 weeks.^{[5, 6]} We reassess after a short course of visits.

In prospective studies, about 9 in 100 patients had a minor reaction such as bleeding, soreness or redness at a needle site, and serious events occurred in about 1 in 10,000 patients.^[12] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker (relevant to electroacupuncture).

Ayurvedic medicine for IBS

The Ayurvedic view

Ayurveda describes a condition resembling IBS as Grahani Roga, a disorder of agni, the digestive fire in this tradition. Depending on the person, it is described as involving Vata, Pitta or Kapha. These are traditional categories used to individualize care, not biomedical diagnoses.

Therapies that may be used

Care is chosen for the individual and traditionally combines:

• Regular meals, warm cooked foods and attention to individual food triggers
• Daily routines for sleep, meal timing and stress
• Herbs and formulas that are prescribed individually by a qualified practitioner, such as combinations containing turmeric
• Gentle oil-based therapies

Panchakarma is not appropriate during pregnancy, acute illness or frailty, or before warning symptoms have been medically assessed.

What the research shows

The research on Ayurveda for IBS is limited. A randomized trial of 69 patients in Germany compared Ayurvedic nutritional therapy with conventional nutritional therapy including a low FODMAP diet. Symptom scores fell more with the Ayurvedic approach, though the authors described the study as exploratory.^[13] A trial of 48 patients in India found a whole-system Ayurveda protocol improved symptom scores more than a single herbal powder, with no placebo group.^[14]

A placebo-controlled crossover trial of 32 patients with IBS-D found an Ayurvedic preparation of curry leaf, pomegranate and turmeric no better than placebo. About one third of participants reported at least one minor adverse event.^[15]

Herbal medicine for IBS

Herbs and formulas that have been studied

Peppermint oil is the most studied herb. Others with trial data include aloe vera, asafoetida (hing) and several multi-herb formulas.^[16] Chinese herbal formulas, both standardized and individually prescribed, have been compared with placebo and antispasmodic drugs.^[17]

What the research shows

The evidence is limited and of low quality overall. A meta-analysis of 10 trials with 1,030 patients found peppermint oil beat placebo for global symptoms and abdominal pain, but rated the evidence as very low quality and noted more adverse events.^[18] A review of 33 placebo-controlled trials of Western herbs concluded that several show promise, but apart from peppermint oil, aloe vera and asafoetida the positive trials have not been replicated.^[16]

A network meta-analysis of 57 trials found Chinese herbal medicine improved global symptoms and abdominal pain, with results similar to antispasmodic drugs. The authors rated the evidence very low quality and noted that Chinese herbal formulas caused more adverse events than placebo.^[17]

Safety and herb-drug interactions

Herbs can interact with medicines, sometimes with serious results, including enhanced bleeding with blood thinners.^[19] Tell us about all prescribed medicines, including blood thinners, antidepressants, thyroid and diabetes drugs.

In one study, about one fifth of Ayurvedic products bought online contained detectable lead, mercury or arsenic.^[20] Herbs should come from tested sources and be prescribed individually. Tell us if you are pregnant or breastfeeding or have liver or kidney disease.

Translating traditional medicine into modern biological language

The links drawn here are interpretation, not equivalence. Chinese medicine often describes IBS as liver qi stagnation with spleen weakness, a pattern in which stress and digestion affect each other. Researchers studying acupuncture look at things that loosely parallel this, including gut movement, visceral sensitivity and gut-brain signaling.^[11]

Ayurveda's weak agni describes irregular digestion and bowel habits. No study has shown that agni or a dosha corresponds to a specific biological process.

How this care fits with your medical care

Integrative care for IBS is complementary. Keep your physician or gastroenterologist, and do not stop or change prescribed medicines or diets without talking to your prescriber or dietitian. We do not diagnose IBS or rule out other bowel diseases, so new or changing symptoms should be medically evaluated.

Please bring your diagnosis, results of any blood tests, stool tests or colonoscopy, and a full list of medicines and supplements.

When to seek urgent medical care

Some symptoms are not typical of IBS and need prompt evaluation.^{[2, 3]}

• Rectal bleeding or black stools
• Unintended weight loss
• Anemia
• Fever, or severe or constant abdominal pain
• Symptoms that begin after age 50 or wake you at night
• A family history of inflammatory bowel disease, celiac disease or colon cancer

If you have severe belly pain, repeated vomiting, or heavy bleeding, call 911 or go to the nearest emergency department.