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Rectal prolapse and faecal incontinence

Essential points for quick revision.

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Escalate

An incarcerated prolapse that cannot be reduced, becomes dusky or necrotic, causes severe pain, obstruction or substantial bleeding needs urgent colorectal review. New faecal incontinence with saddle sensory loss, urinary retention or progressive leg weakness requires emergency assessment for cauda equina compression.

Synopsis

Differentiate rectal prolapse from haemorrhoidal or pelvic-organ prolapse, assess faecal incontinence systematically, and progress from reversible causes to specialist functional treatment.

  • Full-thickness rectal prolapse produces concentric circumferential folds; prolapsing haemorrhoids form discrete radial columns, while mucosal prolapse is a more limited lining descent.
  • Symptoms include a protruding mass, mucus, bleeding, incomplete evacuation, obstructed defaecation, urgency and passive leakage; patients may need to photograph an intermittent prolapse.
  • Faecal incontinence means involuntary loss of stool that is a social or hygienic problem and should be asked about directly and without stigma.

Key red flags

Incarcerated prolapse

A swollen irreducible segment with escalating pain, bleeding, ulceration or dusky colour suggests venous obstruction and threatened ischaemia, requiring urgent specialist reduction or surgery.

Investigation priorities

01
Bowel and continence diaryFirst step

Define stool form, timing, triggers, urgency, leakage and toileting context.

Management branches

BaselineStructured continence assessment

Any involuntary stool loss that causes a social or hygienic problem.

  1. Ask sensitively about solid, liquid and flatus leakage, awareness, urgency, frequency, obstetric and surgical history, stool form, diet, medicines, cognition, mobility and toilet access.
  2. Treat immediate reversible causes including faecal loading, acute diarrhoea, infection and medication effects; investigate red flags and provide skin protection and practical containment meanwhile.

Key medicines

LoperamideStart low and titrate timing and amount under the continence plan.
Bulk-forming fibre preparationIntroduce gradually with adequate fluid and adjust against the stool diary.
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Sources and review status4 sources · checked 27 Aug 2026 · clinical review pending
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom