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An anal fissure is a tear in the lining of the lower rectum (anus). It can itch and cause pain. You may notice bright red blood on toilet paper after you wipe. A fissure may form if you're constipated and try to pass a large, hard stool or if you don't relax your anal muscles during a bowel movement.
Most anal fissures heal with home treatment after a few days or weeks. If you have an anal fissure that takes more time to heal, your doctor may prescribe medicine. In rare cases, surgery may be needed.
Anal fissures don't lead to colon cancer or other serious illnesses. But if you have blood mixed in with the stool, talk to your doctor.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Call your doctor or nurse advice line now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor or nurse advice line if:
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Current as of: March 22, 2023
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
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