First, your doctor will look at the anal area, perhaps by inserting a lubricated gloved finger or an anoscope (a hollow, lighted tube for viewing the lower few inches of the rectum) or a proctoscope (which works like an anoscope, but provides a more thorough rectal examination). More procedures may be needed to identify internal hemorrhoids or rule out other ailments that frequently cause anal bleeding, such as anal fissure, colitis, Crohn’s disease, and colorectal cancer. To see further into the anal canal (into the lower colon, or sigmoid), sigmoidoscopy may be used, or the entire colon may be viewed with colonoscopy. For both procedures, a lighted, flexible viewing tube is inserted into the rectum. A barium X-ray can show the entire colon’s interior. First a barium enema is given and then X-rays are taken of the lower gastrointestinal tract.

It is an opening around or near the anus, sometimes at a distance of 2 – 4 inches. It occurs with pus discharge, swelling or pain around that area.

Yes, Fistula in ano is occasionally a painful problem. Whenever the wound track is full of pus it results in severe pain that will cause discomfort to patient & when the pus drains out the pain also reduces.

It is a wound present inside the anus where the inner skin of the rectum joins the outer skin of the anus.