An anal fissure fissure-in-ano is a small, oval shaped tear in skin that lines the opening of the anus. Fissures typically cause severe pain and bleeding with bowel movements. Fissures are quite common in the general population, but are often confused with other causes of pain and bleeding, such as hemorrhoids. Anal fissures can occur at any age and have equal gender distribution. A small number of patients may actually have fissures in both the front and the back locations.
Anal fissure - Symptoms and causes - Mayo Clinic
An anal fissure is a small cut or tear in the lining of the anus. The crack in the skin causes severe pain and some bright red bleeding during and after bowel movements. At times, the fissure can be deep enough to expose the muscle tissue underneath. In most cases, the tear heals on its own within four to six weeks.
An anal fissure is a break or tear in the skin of the anal canal. Anal fissures may be noticed by bright red anal bleeding on toilet paper and undergarments, or sometimes in the toilet. If acute they are painful after defecation,  but with chronic fissures, pain intensity often reduces.
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.