Most anal fissures cause:

• A sharp, stinging or burning pain during a bowel movement. Pain from a fissure may be quite severe. It can be brief or last for several hours after a bowel movement.
• Itching.
• Bleeding, often a small spot of bright red blood on toilet tissue. Tell your doctor if you have any bleeding with a bowel movement.

An anal fissure can be a painless wound that won't heal and that bleeds intermittently but causes no other symptoms.