Is Anorectal manometry serious?
Last updated September 7, 2026.
No, anorectal manometry is a low-risk outpatient test, and having it ordered does not mean your doctor suspects something serious. The test measures how well your anal sphincter muscles and rectal nerves squeeze, relax, and sense fullness, using a thin flexible tube with a small balloon on the end. It usually takes about 30 minutes, does not require sedation, and you stay awake and able to drive yourself home. Most people describe pressure or a strong urge to have a bowel movement rather than pain, and light spotting or cramping for a day is common. What matters more than the test itself is the reason behind it, such as long-standing constipation, stool leakage, or planning for rectal surgery. Follow the prep instructions you are given, usually an enema a couple of hours before, and tell the team about anal fissures, hemorrhoids, recent rectal surgery, or a latex allergy.
What to do
- Follow the prep exactly: Most centers ask for an enema one to two hours before so the rectum is empty and readings are accurate.
- Report your history first: Tell the team about anal fissures, active hemorrhoids, recent rectal or pelvic surgery, radiation, or a latex allergy.
- Keep your usual routine: Ask whether to hold laxatives or stool softeners, but continue other prescriptions unless your clinician says otherwise.
- Expect pressure, not pain: The urge to have a bowel movement during balloon inflation is normal and passes within seconds, so breathe slowly and stay relaxed.
- Plan a normal day after: No sedation means no driver needed, and you can return to work, eating, and exercise the same day.
- Call for warning signs: Contact your clinician for heavy rectal bleeding, fever, or severe abdominal pain in the days after the test.
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