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 are constipated and try to pass a large, hard stool or if you do not 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 do not 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 call line 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.
Watch closely for changes in your health, and be sure to contact your doctor or nurse call line if:
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Current as of:
August 9, 2016
Adam Husney, MD - Family Medicine
& E. Gregory Thompson, MD - Internal Medicine
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