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Published on: 8/20/2026

What are the common causes of feeling like a bowel movement is incomplete?

The sensation of an incomplete bowel movement—often called tenesmus—is most commonly caused by constipation, pelvic floor muscle dysfunction, or irritable bowel syndrome (IBS). Other possible causes include hemorrhoids, inflammatory bowel disease (IBD), rectal inflammation (proctitis), or, in rare cases, a rectal obstruction.

Because these causes range from mild to more serious, identifying the root of the problem is the key to relief. Symptoms like bloating, cramping, blood in the stool, or persistent urgency can point to very different conditions, and self-diagnosing can lead to unnecessary worry or delayed care.

The fastest way to understand what may be going on is to take a free, instant, online symptom check. In just a few minutes, you'll get personalized insights based on your symptoms and clear guidance on what steps to take next—so you can stop guessing and start feeling better.

Reviewed for medical accuracy: 07/15/2026

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Explanation

When you feel like you haven't completed a bowel movement, constipation is usually a main factor. Constipation makes your stools hard and dry, so it does not travel easily through your colon. This slow movement means some stool may remain, leading to an uneasy feeling afterward. The muscles in your pelvic area help push the stool out, and if these muscles do not work properly—a condition called pelvic floor dysfunction—it can be hard to fully empty your bowels.

Irritable bowel syndrome (IBS) is another common cause. IBS can cause mixed symptoms like constipation and diarrhea, and people with IBS often feel like they have not completely finished their bowel movement.

Other common contributors include eating too few fibrous foods, not drinking enough fluids, or even stress. All these factors can affect how well your intestines move things along, leaving you with that uncomfortable feeling of incomplete evacuation. If you're experiencing persistent symptoms, try our free symptom checker to better understand what might be causing your discomfort.

(References)

  • Jani B, Marsicano E. Constipation: Evaluation and Management. Mo Med. 2018 May-Jun;115(3):236-240. PMID: 30228729; PMCID: PMC6140151.

  • Heidelbaugh J, Martinez de Andino N, Pineles D, Poppers DM. Diagnosing Constipation Spectrum Disorders in a Primary Care Setting. J Clin Med. 2021 Mar 5;10(5):1092. doi: 10.3390/jcm10051092. PMID: 33807888; PMCID: PMC7961346.

  • Bellini M, Gambaccini D, Usai-Satta P, De Bortoli N, Bertani L, Marchi S, Stasi C. Irritable bowel syndrome and chronic constipation: Fact and fiction. World J Gastroenterol. 2015 Oct 28;21(40):11362-70. doi: 10.3748/wjg.v21.i40.11362. PMID: 26523103; PMCID: PMC4616212.

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