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Fissures

An anal fissure is a small tear in the lining of the anus, usually caused by hard stool/constipation, leading to severe pain during bowel movements (often described as “passing glass”) and bright red blood on toilet paper. 90–95% heal with non-surgical treatment. Surgery is needed only in chronic fissures (>6–8 weeks) that fail conservative measures.

Grading & Types

  • Acute: Recent (<6 weeks), superficial → heals easily.
  • Chronic: >6–8 weeks, with visible fibers of internal sphincter, sentinel pile (skin tag), or papilloma → surgery often required.

What to Expect with LIS (Most Common Surgery)

  • Day-case or overnight stay
  • Spinal or local anesthesia + sedation
  • 10–15 minute procedure
  • First bowel movement still painful, but pain drops dramatically within 3–7 days
  • Return to work: 1–2 weeks
  • Restrictions: No heavy lifting 2 weeks; continue fiber forever
  • Complications: Bleeding (<2%), infection/abscess (<1%), minor incontinence to flatus/seepage (5–8%, usually temporary)

Prevention of Recurrence (Critical!)

  • 30–40 g fiber daily + adequate water
  • Never ignore the urge to go
  • Avoid chronic diarrhea (common after surgery if over-laxatives used)

Red flags → see surgeon urgently:

  • Fissure not healing after 6–8 weeks of proper medical treatment
  • Multiple/recurrent fissures
  • Associated Crohn’s, TB, cancer, HIV (atypical fissures)