Anal fissure after childbirth

How recovery typically progresses

Immediately after

First days

In the first days after birth, hard stool, fear of straining, dehydration, iron-related constipation, and pelvic soreness can make bowel movements difficult. Sharp pain with a small bright-red streak suggests a fissure, while a tender external lump may suggest a thrombosed hemorrhoid. Heavy bleeding, fever, swelling, or constant severe pain needs prompt assessment.

Settling in

Early weeks

Across the first two postpartum months, fissures may appear later than thrombosed external hemorrhoids. Continue fluid, dietary fiber, gentle movement, and the stool-softening plan provided by the maternity team. If pain or bleeding is not steadily improving, an examination can distinguish a fissure from hemorrhoids, infection, or another source.

Longer arc

Beyond six weeks

Symptoms lasting beyond six weeks, repeatedly reopening, occurring away from the midline, or accompanied by diarrhea, weight loss, pus, fever, or abdominal symptoms deserve medical assessment. Postpartum fissures may occur despite low anal resting pressure, so invasive sphincter procedures require specialist judgment rather than assumptions based on typical chronic fissures.

What does the evidence show for anal fissure after childbirth?

• An anal fissure is a tear in the anal mucosa that commonly follows passage of hard or large stool and can occur after childbirth. Typical symptoms are pain with bowel movements and bright-red blood on the outside of stool or toilet paper. Fiber, fluids, stool-softening support, and warm sitz baths are common first steps. 1
• In a prospective study of 165 pregnant patients examined before and after birth, 25 anal fissures were identified postpartum and appeared across the two-month follow-up, whereas thrombosed external hemorrhoids clustered mainly on the first postpartum day. Difficult or painful defecation was the strongest associated factor for the combined lesions. 2
• A prospective manometry study identified postpartum anal fissure in 29 of 313 participants. Anal canal pressures fell after birth in both those with and without fissures; constipation was more frequent with fissures. The authors cautioned against assuming a high-pressure mechanism or choosing sphincter surgery without specialist assessment. 3
• A prospective cohort of 280 pregnant patients found hemorrhoids and fissures were common as a combined endpoint during pregnancy and the first postpartum month. Constipation, previous perianal disease, prolonged straining, and higher infant birthweight were associated, but only nine fissures occurred and the study did not estimate fissure-specific effects reliably. 4
• Most primary fissures are single and midline. Multiple, off-midline, or nonhealing fissures can be associated with inflammatory bowel disease, infection, malignancy, or another secondary cause and need further assessment. An acute fissure is generally under six weeks in duration; longer persistence is considered chronic. 5

When should I call my provider about anal fissure after childbirth?

Seek prompt assessment for fever, pus, spreading redness or swelling, a rapidly enlarging tender lump, constant severe anal pain, heavy rectal bleeding, black or maroon stool, dizziness, or fainting. Persistent, recurrent, multiple, off-midline, or nonhealing fissures also need evaluation because infection, inflammatory bowel disease, or another secondary cause may be present. None of these lists replace your own judgment: if this symptom worries you, that on its own is enough reason to check in with your healthcare provider.