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Published on: 8/20/2026
Incomplete bowel emptying occurs when stool is not fully passed during a bowel movement. Common causes include:
Because these causes range from muscle dysfunction to dietary habits—and can sometimes signal an underlying condition—identifying the right cause is essential for choosing the right treatment. Guessing can delay relief or overlook a more serious issue. The fastest, easiest way to get clarity is to take a free, instant, online symptom check to better understand your symptoms and confidently plan your next steps.
Reviewed for medical accuracy: 07/15/2026
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There are several reasons why your bowel may not empty completely. One main factor is dyssynergic defecation, which means that the muscles in your pelvic floor and the anal sphincter (the muscles at the end of your digestive tract) do not work well together when you try to defecate. This lack of coordination makes it harder for stools to pass through. Another reason is slow colonic motility, where the colon moves stools through too slowly. When stools move slowly, it can build up and become harder to pass through. Additionally, behaviors can play a role. For example, if a person does not follow a regular toileting routine, has a diet low in fiber, or does not drink enough water, it can make stools harder and bulkier, making it difficult to fully empty the bowel. Other factors like decreased physical activity or the side effects of some medications can also contribute to this issue. If you're experiencing persistent symptoms of incomplete bowel emptying, you can use our AI-powered symptom checker to better understand your condition and determine whether you should seek medical care. All these factors can add up to cause a feeling of incomplete bowel emptying.
(References)
Rao SS, Patcharatrakul T. Diagnosis and Treatment of Dyssynergic Defecation. J Neurogastroenterol Motil. 2016 Jul 30;22(3):423-35. doi: 10.5056/jnm16060. PMID: 27270989; PMCID: PMC4930297.
Dzierżanowski T, Ciałkowska-Rysz A. Behavioral risk factors of constipation in palliative care patients. Support Care Cancer. 2015 Jun;23(6):1787-93. doi: 10.1007/s00520-014-2495-6. Epub 2014 Dec 4. PMID: 25471176; PMCID: PMC4555193.
Sarna SK. Colonic Motility: From Bench Side to Bedside. San Rafael (CA): Morgan & Claypool Life Sciences; 2010. Colonic Motility Dysfunction.
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