An anal fissure is a small tear or ulcer open sore in the skin just inside your anus bottom. It causes severe pain, and sometimes bleeding when you pass faeces. Anal fissures often go away by themselves with some simple self-help measures. Anal fissures develop in the skin lining your back passage, just inside your anus your anal canal. Anal fissures usually develop towards the back of your anus. You can sometimes get one at the front of your anus though, or even both together. Anal fissures are common.
The anal canal is a short tube surrounded by muscle at the end of your rectum. The rectum is the bottom section of your colon large intestine. An anal fissure also called fissure-in-ano is a small rip or tear in the lining of the anal canal. Fissures are common, but are often confused with other anal conditions, such as hemorrhoids. Fissures are usually caused by trauma to the inner lining of the anus from a bowel movement or other stretching of the anal canal.
Corresponding author: A Boutall boutall icloud. This typically presents with pain on defecation and blood spotting on toilet paper. These symptoms are due to an ischaemic mucosal ulcer within a high-pressure sphincter.