In a simple word, we can say that Anal fistula are an abnormal extension of track from anal canal to outside usually opens to perianal skin. The infection or mild injury in the anal canal due to constipation or any other reason is a common cause for Anal fistula. In fact, following drainage of a perianal abscess, there is an approximate 50% chance of developing a chronic fistula. Other fistulae develop secondary to trauma, Crohn’s disease, anal fissures, carcinoma, radiation therapy, tuberculosis, and chlamydial infections.
Very long standing fissure develops hard fibroid tissue. Later on, perennial abscess or an anal fissure may form as a complication which leads to form fistulae tract.Fistulae in Ano is also a common cause of anal stenosis / spasmodic anus.
Symptoms of Anal fistula
Pain and swelling are the main symptoms associated with anal fistula. There is a drainage of puss if the fistula tract is opened to outside. Ayurveda explains symptoms as pain, itching, bloodstained stools, difficulty to sit and puss drainage.