In plain words
An anal fissure is a small tear in the thin skin lining the anus. It often hurts sharply during and after a bowel movement, and you may see bright red blood on the toilet paper. Hard stools, constipation, and straining are common causes. Pregnancy and the first weeks after birth can bring all three. Most fissures heal with gentle habits and time, and clinicians have options that do not need surgery. Hemorrhoids can look and feel similar, so a clinician usually needs to check. Call your provider if pain is severe or lasts more than a few days. Heavy bleeding, or feeling faint, needs emergency care.
The deeper version
An anal fissure is a linear ulcer of the anoderm distal to the dentate line, classically in the posterior midline. Its pathophysiology involves elevated tone and reduced anodermal blood flow. Chronic fissure, usually defined by duration beyond six weeks, may show a sentinel pile or hypertrophied papilla. Management follows a stepwise ladder that starts with agents of established safety, including fiber, stool softeners, topical agents, and sitz baths, as summarized in American College of Gastroenterology guidance (Wald and colleagues, 2021). Telling fissure apart from hemorrhoids, fistula, and malignancy depends on examination. The controversy concerns the relative efficacy of topical agents versus botulinum toxin and surgery in refractory cases.
Where it comes up
- Constipation and hemorrhoids in pregnancyPregnancy: Your Body
- The first poop, constipation, and hemorrhoids after birthPostpartum: Your Body
What mothers here say about anal fissure
No one has posted under this term yet.
Sources
- American College of Gastroenterology — Clinical guideline on anorectal pain and anal fissure (Bharucha and colleagues, 2015)