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The 40 pages that link to Irritable bowel syndrome, each with the reason it gives.

• Dietary fiberRelated: Fiber choice matters because some types help symptoms while others can worsen them.

• Clostridioides difficile infectionCompared with: It can cause diarrhea, but does not produce the toxin-mediated colonic injury of this infection.

• Celiac diseaseCompared with: Its digestive symptoms can resemble celiac disease, but it does not cause villous atrophy.

• Foodborne illnessCompared with: Its recurring symptoms can resemble infection, but it is not itself caused by contaminated food.

• Lactose intoleranceCompared with: Its symptoms can overlap with lactose intolerance, complicating attribution of discomfort to dairy.

• AtropineRelated: Atropine-like antimuscarinic action can reduce intestinal smooth-muscle activity, though atropine is not a standard treatment.

• Enteric nervous systemRelated: Altered gut sensitivity and motility can involve interactions with enteric neural pathways.

• EndometriosisCompared with: Its symptoms can overlap with bowel-related endometriosis, complicating diagnosis and care.

• Central sensitizationRelated: Visceral hypersensitivity and altered central processing can contribute to its pain symptoms.

• ProbioticsRelated: Trials assess probiotics for symptoms, but findings differ among products and patients.

• Inflammatory bowel diseaseCompared with: Similar symptoms can occur, but IBS does not cause the tissue inflammation that defines IBD.

• ConstipationNarrower topic: Its constipation-predominant subtype includes constipation alongside recurrent abdominal pain.

• Large intestineRelated: It often affects bowel function and stool passage despite no evident intestinal injury.

• Antibiotic-associated diarrheaCompared with: Its recurring symptoms can resemble diarrhea after antibiotics but are not defined by antibiotic exposure.

• Crohn's diseaseCompared with: Its symptoms can resemble Crohn's, but it does not cause the tissue injury seen in inflammatory bowel disease.

• Gluten-free dietCompared with: Some people with IBS improve by avoiding wheat, without gluten being the cause.

• Psychosomatic medicineBroader topic: Brain–gut interactions are central to understanding symptoms and treatment.

• Ulcerative colitisCompared with: Similar symptoms can occur, but it does not cause the ulcers and inflammation of colitis.

• DiarrheaRelated: Its diarrhea-predominant form causes recurring loose stools without intestinal tissue damage.

• GastroenteritisCompared with: It can cause diarrhea and pain but is not an acute inflammation caused by infection.

• MalabsorptionCompared with: It can resemble malabsorptive illness symptomatically, but does not itself imply nutrient uptake failure.

• Gut-brain axisBroader topic: Altered gut sensitivity and brain processing are central to many accounts of its symptoms.

• ColonRelated: Changes in colonic sensitivity and motility contribute to its symptoms.

• CryptosporidiosisCompared with: It can cause diarrhea but does not result from an intestinal parasite.

• SorbitolRelated: Sorbitol can trigger or worsen symptoms in some people with this disorder.

• Colonic fermentationRelated: Fermentation-related gas, distension, and sensitivity can influence symptoms in some people.

• FODMAPsNarrower topic: FODMAP sensitivity is one dietary factor that can contribute to symptoms in some people with IBS.

• DysenteryCompared with: It can cause cramps and diarrhea, but blood is not a typical feature.

• Osmotic diarrheaCompared with: Pain is central to this syndrome, whereas osmotic diarrhea names a physiological mechanism.

• DiverticulitisCompared with: It can mimic abdominal discomfort but does not cause diverticular inflammation.

• Abdominal painRelated: It causes recurrent pain without the tissue damage typical of many acute abdominal illnesses.

• FlatulenceRelated: Gas and bloating commonly accompany this disorder, although gas production may not be unusually high.

• Acute abdomenCompared with: Its recurrent course contrasts with the acute, potentially life-threatening presentation.

• HyoscyamineRelated: Hyoscyamine may be prescribed to relieve cramping in some cases.

• LoperamideRelated: Loperamide may help diarrhea-predominant symptoms, though it does not treat the syndrome’s abdominal pain.

• Open-label placeboBroader topic: A prominent open-label placebo trial reported symptom improvement in people with this condition.

• Carcinoid syndromeCompared with: Diarrhea overlaps, but this disorder does not arise from tumor-secreted hormones.

• BelchingRelated: Belching may occur with its broader pattern of digestive symptoms.

• InulinRelated: Inulin can worsen gas and other symptoms in some people with this condition.

• Gastrointestinal diseaseBroader topic: It shows that substantial symptoms can occur without structural damage explaining them.