About 12 percent of people in the United States have irritable bowel syndrome, according to the NIH's National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Women are up to twice as likely as men to develop it.
That is a large group of Americans quietly dealing with cramps, bloating and unpredictable bathroom trips. Many chalk it up to a sensitive stomach and never mention it to a doctor.
IBS is a clinical diagnosis, not a self-check. But knowing the recognized signs can help you have a useful conversation with your physician if the pattern sounds familiar.
8 signs the NIDDK links to IBS
The federal digestive-disease institute describes IBS as a group of symptoms that occur together, centered on recurrent abdominal pain and changes in bowel habits.
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- Recurrent abdominal pain tied to bowel movements. The pain often eases, or sometimes flares, right after you go.
- Diarrhea. Loose or watery stools that can come on urgently.
- Constipation. Hard, infrequent stools that are difficult to pass.
- Alternating diarrhea and constipation. Stretches of one, then a swing to the other.
- Bloating. A tight, distended abdomen that often builds through the day.
- A feeling of incomplete evacuation. The sense that a bowel movement is not finished, even right after going.
- Whitish mucus in the stool. The NIDDK lists a thin, pale mucus as a recognized IBS sign.
- Symptom flares around menstrual periods. Women with IBS often have more symptoms during their periods.
Clinicians use the Rome IV criteria to diagnose IBS. That means recurrent abdominal pain at least one day a week over the previous three months, tied to bowel movements or a change in stool pattern.
Anyone ticking several of these boxes for weeks should see a physician rather than self-diagnose. Celiac disease and inflammatory bowel disease can produce overlapping symptoms.
The foods most likely to set it off
The NIDDK highlights three dietary strategies for people with IBS. Increasing soluble fiber can ease constipation by making stool softer and easier to pass, and adults are told to aim for 22 to 34 grams a day, added gradually.
The institute also suggests trying a gluten-free trial period, since some people with IBS improve on it even without celiac disease. And it recommends the low-FODMAP diet, which cuts back on carbohydrates that are hard to digest.
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Research consistently points to a short list of usual food suspects. A study of 857 Korean adults published in April 2021 in the journal Nutrients found that people with IBS ate significantly more fat than people without the condition.
Among the 186 IBS patients in the study, gluten-containing FODMAP foods were among the most common triggers: about 71 percent reported symptoms after instant ramen, roughly 69 percent after noodles with vegetables and seafood, and about 67 percent after pizza. Nearly 62 percent said caffeine triggered symptoms, and around 54 percent reported problems with alcohol.
What the low-FODMAP approach actually involves
FODMAPs is shorthand for a family of poorly absorbed short-chain carbohydrates found in many everyday foods. The NIDDK lists apples, pears, watermelon, onions, garlic, cauliflower, beans, milk products, wheat, rye, honey and sweeteners ending in -ol such as sorbitol and xylitol.
The low-FODMAP diet has been identified by the American Gastroenterological Association as the most evidence-based dietary intervention for IBS.
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It runs in three phases. A four- to six-week restriction period, then a systematic reintroduction of foods, then a personalized long-term plan built around what the individual actually tolerates.
Because the plan is restrictive, guidelines urge people to run it with a doctor or a registered dietitian rather than alone. Blood in the stool, unexplained weight loss or a family history of bowel cancer are red flags that warrant a prompt medical visit.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.