What it is
Feeling of incomplete bowel movement (tenesmus) describes the persistent sensation of needing to defaecate despite having done so — or the inability to feel the bowel is fully empty after defaecation.
A persistent sensation of needing to open the bowels despite having done so, or the feeling that defaecation is incomplete — often associated with rectal or pelvic floor pathology.

At a glance
What it is
Feeling of incomplete bowel movement (tenesmus) describes the persistent sensation of needing to defaecate despite having done so — or the inability to feel the bowel is fully empty after defaecation.
Commonly experienced as
Evidence context
Emerging evidenceSee the evidence snapshotSafety
See staying safeHistory & Origin
The feeling of incomplete bowel emptying encompasses two related experiences: tenesmus (a continuous or recurrent urge to defaecate, often with straining, that produces little or no stool — associated with rectal inflammation or mass), and incomplete evacuation (the sensation after defaecation that stool remains, common in IBS-C, anterior rectocele, dyssynergic defaecation, and rectal intussusception). These symptoms reflect disrupted anorectal coordination, mucosal hypersensitivity (in IBD and IBS), mechanical obstruction of evacuation (rectocele, rectal prolapse), or neuromuscular dysfunction of the pelvic floor. Tenesmus in particular is a red flag symptom for colorectal malignancy when new in onset, persistent, or accompanied by rectal bleeding or weight loss.
The Evidence
What research and clinical practice say about the sensation of incomplete bowel emptying, and when it needs professional assessment.
A common but clinically meaningful symptom worth investigating
Incomplete bowel emptying is well-recognised in functional and structural gut conditions, with reasonable evidence for targeted interventions like pelvic floor biofeedback. New or persistent symptoms — especially with bleeding or weight loss — require prompt professional assessment.
New onset of this sensation alongside rectal bleeding or unexplained weight loss warrants urgent assessment to exclude colorectal cancer. Fever, abdominal pain, and diarrhoea together may indicate an IBD flare or infective colitis. Inability to pass stool at all alongside severe straining may signal impaction or obstruction — seek same-day care.
Pelvic floor biofeedback for dyssynergic defaecation is among the better-supported interventions in this area. Low-FODMAP dietary approaches and gut-directed hypnotherapy have reasonable evidence in IBS-related incomplete emptying. For structural causes such as rectocele or rectal prolapse, evidence favours physiotherapy first, with surgery reserved for refractory cases.
Incomplete emptying may reflect anorectal coordination problems, mucosal hypersensitivity in IBS or IBD, mechanical factors like rectocele, or pelvic floor neuromuscular dysfunction. Identifying which mechanism is involved guides appropriate care. A bowel symptom diary and professional assessment — often including anorectal physiology testing — are typically needed to distinguish these.
Repeated straining to achieve a sense of complete emptying can worsen pelvic floor dysfunction and contribute to haemorrhoids. Regular laxative use without professional assessment may mask a structural cause. If symptoms are persistent, a qualified assessment is more useful than escalating self-treatment.
Pelvic floor physiotherapy, dietary modification, and gut-directed psychological therapies are well-supported care approaches for functional causes. Traditional frameworks including Ayurveda and TCM offer dietary, herbal, and movement-based approaches to support elimination — these may complement conventional care but are not a substitute for professional assessment of persistent or new symptoms.
A GP or gastroenterologist is the appropriate first point of contact for new, persistent, or worsening symptoms. Pelvic floor physiotherapists are well-placed to assess and support functional evacuation difficulties. Dietitians with gut health experience can guide dietary changes. Complementary practitioners may offer supportive care alongside — not instead of — a professional assessment.
Safety first
General, informational guidance — not diagnostic. A qualified practitioner can advise on your own situation.
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