Digestive Issues

IBS, constipation and bloating can overlap with conditions that need medical care, so a doctor checks first. Among holistic options, gut-directed hypnotherapy and peppermint oil have the most support. Acupuncture has not beaten sham treatment in IBS trials.

When to see a medical doctor first

• Rectal bleeding, blood on toilet paper, blood in the stool or black stools, or weight loss you didn't try for. See a clinician promptly, even if you think it is IBS (Mayo Clinic).
• Constipation that lasts more than three weeks, makes everyday activities hard, or comes with stomach pain that doesn't stop or other unusual changes in the shape or color of stool (Mayo Clinic).
• The American College of Gastroenterology's 2021 IBS guideline lists these warning features: rectal bleeding, black stools, unintended weight loss, symptoms that start at an older age, and a family history of inflammatory bowel disease (IBD), colon cancer or other significant digestive disease.
• Routine colorectal cancer screening is recommended from age 45 for adults at average risk (USPSTF).

What a medical workup usually checks first

For constipation, the NHS starts with more fiber and fluids, daily activity, and short-term laxatives if needed. For IBS-type symptoms, the ACG's 2021 guideline suggests celiac blood tests and, for people with diarrhea-predominant symptoms and no warning features, a stool test (fecal calprotectin) and a CRP blood test to rule out IBD. It advises against routine colonoscopy under age 45 when there are no warning signs. It also advises against routine stool tests for infections in everyone with IBS, and against food allergy or sensitivity testing unless symptoms reproducibly point to a food allergy (full guideline). Warning features call for a fuller workup, usually including colonoscopy.

What the evidence says about holistic options

Therapy	Evidence	Notes
Gut-directed hypnotherapy	Supported, with caveats	Several studies and guidelines recommend it for IBS, but evidence quality is low (NCCIH).
Peppermint oil (enteric-coated)	Mixed/limited	May modestly ease pain, bloating and gas in the short term. Guidelines recommend it on low-quality evidence.
Probiotics	Mixed/limited	The ACG's 2021 IBS guideline suggests against them for treating overall IBS symptoms, a conditional recommendation based on very low-quality evidence.
Yoga	Mixed/limited	A 2022 Cochrane review of five trials found symptom benefit, but no gain in quality of life or abdominal pain (very low certainty).
Acupuncture	Not supported	Sham-controlled trials show no benefit over placebo for IBS symptom severity or quality of life.
Chiropractic or spinal manipulation	Unconfirmed	Not covered by the NCCIH IBS review.
Massage	Unconfirmed	Not covered by the NCCIH IBS review.
Naturopathic or functional medicine	Unconfirmed	No source found.

Unconfirmed means we found no source in this review. It is not a verdict either way.

Who people see for digestive issues on this site

• Functional medicine doctors: a practice style, not a license. Check the clinician's MD, DO, NP or PA license.
• Integrative medicine doctors: licensed MDs or DOs.
• Naturopathic doctors in our directory: not licensed in New York, so diagnosis and prescribing there depend on another license, such as MD, DO or NP.
• Wellness centers: a business, not a license. Check each clinician, and who orders any labs.

You can check a New York license on the NYSED verification search.

Questions to ask a practitioner

• Which tests will you order to rule out celiac disease, IBD or anemia before calling this IBS, and when do you refer for a colonoscopy?
• Which evidence-backed options do you suggest first, such as peppermint oil or gut-directed hypnotherapy, and what are their limits?
• If you suggest probiotics, which strain, dose and duration, and how will you judge whether they help?

Last reviewed: October 2026

Sources

• Mayo Clinic, Constipation: symptoms and causes (15 April 2025)
• Lacy et al., ACG clinical guideline: management of irritable bowel syndrome, American Journal of Gastroenterology (2021)
• US Preventive Services Task Force, Colorectal cancer: screening (May 2021)
• NHS, Constipation (reviewed 26 October 2023)
• NCCIH, Irritable bowel syndrome and complementary health approaches (April 2023)
• NYSED Office of the Professions, online license verification