How should a postoperative hemorrhoidectomy patient who reports a diarrhea‑like sensation be evaluated and managed?

Evaluation and Management of Diarrhea-Like Sensation After Hemorrhoidectomy

Immediate Assessment

A postoperative hemorrhoidectomy patient reporting a "diarrhea-like feeling" requires urgent evaluation to distinguish between normal postoperative urgency, fecal incontinence, and overflow diarrhea from impaction. 1

Critical Red Flags to Exclude First

• Check vital signs and assess for fever, severe pain, or urinary retention – these suggest necrotizing pelvic sepsis, a rare but life-threatening complication requiring emergency evaluation 2
• Perform a digital rectal examination to exclude fecal impaction with overflow diarrhea, especially in elderly or cognitively impaired patients 1
• Assess for signs of hemodynamic instability (dizziness, tachycardia, hypotension) that may indicate significant bleeding 2

Differential Diagnosis Framework

1. Fecal Incontinence vs. True Diarrhea

The sensation of "diarrhea" may actually represent fecal urgency with or without incontinence rather than true loose stools 1. Distinguish between:

• Urgency alone: Patient reaches toilet in time but experiences sudden, compelling need to defecate
• Passive soiling: Involuntary leakage without awareness
• Urge incontinence: Inability to defer defecation despite awareness 1

Up to 12% of patients develop sphincter defects after hemorrhoidectomy (documented by ultrasonography and manometry), which can manifest as urgency or minor incontinence 3, 2

2. Overflow Diarrhea from Fecal Impaction

• Fecal impaction with overflow is common postoperatively, particularly in patients taking narcotic analgesics for pain control 1
• Digital rectal examination is more reliable than imaging for confirming impaction 1
• Typical patients include those with cognitive issues, on opioid analgesics, or with reduced mobility 1

3. Postoperative Bowel Dysfunction

• Many hemorrhoid patients have pre-existing functional bowel symptoms that may worsen postoperatively 4
• Up to 37% of hemorrhoid patients report bloating, and 34% experience abdominal pain with bowel movements (compared to 3-5% of controls) 4
• Excessive straining, incomplete evacuation, and repeated toilet visits are significantly more common in hemorrhoid patients than controls 4

Diagnostic Workup

Essential Physical Examination

1. Digital rectal examination to assess for:

   • Fecal impaction 1
   • Sphincter tone (reduced tone suggests sphincter injury) 3
   • Masses, fissures, or abscess 2
   • Perineal descent 5

2. External inspection for:

   • Surgical site healing
   • Signs of infection or abscess 3
   • Rectal prolapse 1

When to Order Additional Tests

• Anoscopy is typically impossible in the immediate postoperative period due to pain and should be deferred unless urgent pathology is suspected 2
• Plain abdominal radiography if impaction is suspected but digital examination is inconclusive 1
• Complete blood count if there are signs of infection or ongoing bleeding 2

Management Algorithm

If Fecal Impaction is Confirmed:

1. Manual disimpaction if necessary 1
2. Discontinue or reduce narcotic analgesics (the most common cause of postoperative constipation) 2
3. Initiate bowel regimen: stool softeners, osmotic laxatives (polyethylene glycol or lactulose), and adequate hydration 2
4. Increase dietary fiber to 25-30 grams daily once impaction is resolved 2

If True Urgency/Incontinence Without Impaction:

1. Optimize stool consistency with bulk-forming agents (psyllium husk 5-6 teaspoons with 600 mL water daily) to create formed but soft stools 2, 6
2. Trial of loperamide (antidiarrheal) if stools are loose, starting at 2 mg after each loose stool (maximum 16 mg/day) 7
   • Caution: Monitor elderly patients closely; avoid in those taking QT-prolonging medications 7
   • Discontinue if no improvement in 48 hours 7
3. Bowel habit training: scheduled toilet times, proper positioning, avoiding prolonged sitting 1
4. Pelvic floor physical therapy or biofeedback if symptoms persist beyond 3 months, though evidence for efficacy is limited 1, 2

If Functional Bowel Symptoms (IBS-like):

• Recognize that up to 37% of hemorrhoid patients have pre-existing IBS-like symptoms that may be unmasked or worsened postoperatively 4
• Dietary modifications: identify and avoid trigger foods, consider low-FODMAP diet trial 1
• Antispasmodics for cramping and urgency if pain is prominent 1
• Reassurance and education about the benign nature of functional symptoms 1

Critical Pitfalls to Avoid

• Never assume all postoperative bowel symptoms are "normal" without excluding impaction, infection, or sphincter injury 1, 3
• Do not attribute symptoms to IBS if they were not present preoperatively – nocturnal symptoms and steatorrhea are never features of IBS 1
• Avoid performing anoscopy in the acute postoperative period unless absolutely necessary, as pain may require sedation 2
• Do not continue narcotic analgesics without prophylactic laxatives – this is the most common cause of postoperative constipation with overflow 1

When to Refer for Specialist Evaluation

• Symptoms persisting beyond 3 months despite conservative management 1
• Severe incontinence affecting quality of life – consider anorectal manometry and endoanal ultrasound once conservative measures are exhausted 1
• Suspected sphincter injury (reduced tone on digital examination, passive soiling) 3
• Refractory symptoms with psychological distress – may benefit from multidisciplinary pain center 1

Expected Timeline for Resolution

• Most postoperative bowel dysfunction improves within the first 3 months after hemorrhoidectomy 1
• Spontaneous improvement after 3 months is rare – active intervention is required for persistent symptoms 1
• Early case finding (within first few weeks) and treatment leads to better outcomes than delayed intervention 1