Anal Fissure Diagnosis

• How it is examined+−

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  With the patient comfortable, the anus is gently parted to find the tear. Classic location is the posterior midline; anterior midline is also seen, especially in women. Lateral (side) tears are atypical — Crohn’s, infection, or malignancy stay on the differential.

• Acute versus chronic+−

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  Duration, hard edges, sentinel pile, and hypertrophic papilla support chronicity. Chronic fissures respond less reliably to 4–8 weeks of medical care alone; Botox or LIS enter the conversation more often.

  • Acute: soft edges, short duration
  • Chronic: 6–8+ weeks, hard edges, skin tag
  • Atypical site: extra work-up
• Differential diagnosis+−

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  Thrombosed external hemorrhoid, abscess/fistula, sexually transmitted ulcers, Crohn’s disease, and rarely cancer can mimic symptoms. Anoscopy, rectoscopy, or colonoscopy is added when suspicion rises. Recurrent non-healing “fissures” deserve a cause search — not endless cream alone.

More chapters in this hub

• Anal Fissure Symptoms

  Glass-shard pain, bleeding, and when to seek care

• Medical / Topical Treatment

  Soft stools, sitz baths, NTG and diltiazem creams

• Diet for Anal Fissure

  Diet — explained for shared decision-making

• Botox for Anal Fissure

  Botox: what the procedure aims to do and who it fits

• Lateral Internal Sphincterotomy

  LIS: what the procedure aims to do and who it fits