All About Anal Fissure… An anal fissure is a tear or crack in the skin lining of the anal canal. Common Conditions are pain, discomfort and bleeding during passing the stool. Common Causes of anal fissures include constipation, diarrhoea, childbirth and inflammatory bowel disease. Symptoms of an anal fissure may include pain during and after bowel movements, Per rectal bleeding, itching, and a burning sensation at anal Area. For Treatment Consultation of Anorectal Surgeon.