Anal fissure - Symptoms of anal fissure
NHS Choices Medical Reference
The symptoms of an anal fissure usually include pain and bleeding.
An anal fissure causes a severe and sharp pain when you pass stools (poo). Some people have described the pain as feeling like trying to pass broken glass. Once this sharp pain has passed, it is usually replaced by a deep burning pain, which may be felt for several hours after you have been to the toilet.
Anal fissures can also cause bleeding when you pass stools. Most people notice a small amount of bright red blood, either in their stools or on the toilet paper.
When to see your GP
Speak to your GP if you suspect that you have an anal fissure.
Most anal fissures get better without treatment, but your GP will want to rule out other conditions, such as haemorrhoids (swollen blood vessels in the anus and rectum).
They may also recommend treating the possible cause, such as dietary advice for constipation.