Fissure and Fistula are two of the major anorectal problems of humans. These problems arise from inappropriate eating habits and bad lifestyles. Fissure is actually an unnatural crack or opening in the skin of the anal canal, while fistula is described in medicine as an abnormal connection or passageway between two epithelium-lined organs or vessels that normally do not connect. In case of acute fissures, severe periodic pain may be felt after defecation. However, the force of fissures pain reduces with chronic fissures. Anal fissures generally expand from anal opening and are usually positioned posterior in the midline. Its depth can be sometimes superficial or down to the original sphincter muscle.
On the other hand, the fistula is a form of bodily cavity that burrows under the skin or mucous membrane and has an opening at both ends. A fistula may lead from one cavity to the other cavity of the body, or else it may open out from one cavity to the surface of the body. A fistula is basically like a cut in or around the anal channel and mucus membrane. Further, it mostly sprains while passing stool during severe constipation or chronic dysentery. However, modification in food and work habits can help preventing both fissure and fistula.