Irritable Bowel Syndrome (IBS-C)
Understanding constipation-predominant IBS through community experiences and medical research.
Community experiences, not medical advice
Understanding constipation-predominant IBS through community experiences and medical research.
Irritable Bowel Syndrome with Constipation (IBS-C) is a functional gastrointestinal disorder that affects the large intestine. It is characterized by abdominal pain, bloating, and infrequent or difficult bowel movements.
Rome IV describes IBS as a functional bowel disorder: tummy pain that keeps coming back, together with a change in how often you go or what your stool looks like. IBS-C is the pattern where constipation is the main bowel-habit change. You can read the Rome IV bowel-disorders paper by Mearin, Lacy and colleagues on PubMed.
Based on experiences shared in our community:
Dionne and colleagues (American Journal of Gastroenterology, 2018) found very low-quality evidence that a low-FODMAP diet reduces global IBS symptoms compared with control diets. NICE CG61 allows further dietary management, including a low-FODMAP diet, only after first-line advice and with a healthcare professional who has expertise in dietary management.
View on PubMedA quantitative meta-analysis of brain-imaging studies found that people with IBS and healthy controls both activate visceral-afferent regions during rectal distension. People with IBS showed more consistent activation in emotional-arousal regions (pregenual anterior cingulate and amygdala) and a midbrain cluster involved in pain modulation; controls showed more consistent prefrontal activation.
NIDDK describes IBS as a disorder of gut–brain interaction: a problem with how your brain and your gut work together, which can make the gut more sensitive and change how the bowel muscles contract.
View on PubMed View NIDDK definitionAlammar and colleagues (2019) pooled randomised trials of peppermint oil in adults with IBS. The number needed to treat to prevent one person having persistent abdominal pain was 4.
View on PubMedThe ACG 2021 IBS guideline (Lacy and colleagues) recommends a limited trial of a low-FODMAP diet to improve global IBS symptoms (conditional recommendation; very low-quality evidence). It also suggests peppermint for global IBS symptoms (conditional recommendation; low-quality evidence). If you try a short, dietitian-supported low-FODMAP trial or peppermint, that is what this guideline suggests — not a guarantee.
View on PubMedOptions people and guidelines discuss — not a starter pack of prescription motility medicines.
Comprehensive overview of IBS symptoms, causes, diagnosis, and treatment options.
Visit ResourceDetailed guide on IBS-C management, including dietary changes, medications, and lifestyle modifications.
Visit ResourcePatient-centered information on IBS, with resources for managing symptoms and finding support.
Visit ResourceReal stories shared by our community members about managing IBS-C.
All stories are anonymized to protect privacy while preserving authentic experiences shared by our community.
"After struggling with IBS-C for years, I found that a combination of a low-FODMAP diet, regular exercise, and stress management techniques made the biggest difference. I keep a food and symptom journal which has been incredibly helpful for identifying my personal triggers. I've learned that onions, garlic, and excessive dairy are definite no-gos for me."
"Peppermint oil capsules have been a game-changer for managing my bloating symptoms. I also found that incorporating a probiotic specifically formulated for IBS (with Bifidobacterium strains) has helped regulate my bowel movements. Daily walking for at least 30 minutes seems to keep things moving better than more intense exercise for me personally."
"Working with a dietitian who specializes in digestive disorders was key for me. She helped me implement a modified low-FODMAP approach that wasn't as restrictive as the traditional protocol. I also found that addressing my anxiety through therapy has significantly reduced my flare-ups. Magnesium supplements (the citrate form) have been helpful for maintaining regularity."