Jan 22, 2019 · Anal fissure (fissures) is a very painful condition caused by trauma to the anus and anal canal, which then cuts or tears the anus and anal canal tissue. These tears can be caused by straining to have a bowel movement, hard stools, and chronic episodes of diarrhea. Symptoms include rectal bleeding, anal itching, and painful 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. Most (85-90%) fissures occur in the posterior (back) midline of the anus with about 10-15% occurring in the anterior (front) midline.
Fissures are mainly caused by trauma to the anal canal, such as, with the passage of hard stool. Other theories, such as ischemia to the posterior midline of the anus, have been entertained. Fissures are usually located in the posterior midline of the anus, but can also be seen in the anterior midline, and in both locations at the same time.
cases, the anal fissure is located within the posterior midline of the anal canal. fissures are located in the anterior midline in as many as 25% of female patients and in as many as 8% of male subjects. in 3% of patients, fissures can be located at posterior and anterior positions simultaneously. fissures.