An anal abscess is an infected cavity filled with pus found near the anus or rectum. Ninety percent of abscesses are the result of an acute infection in the internal glands of the anus. Occasionally, bacteria, fecal material or foreign matter can clog an anal gland and tunnel into the tissue around the anus or rectum, where it may then collect in a cavity called an abscess. An anal fistula also commonly called fistula-in-ano is frequently the result of a previous or current anal abscess. Normal anatomy includes small glands just inside the anus.
Lumps and swellings
Abscess and Fistula Expanded Information | ASCRS
An anal, or rectal, abscess occurs when a cavity in the anus becomes filled with pus. It causes extreme pain, fatigue , rectal discharge, and fever. In some cases, anal abscesses can result in painful anal fistulas. A blocked anal gland, a sexually transmitted infection STI , or an infected anal fissure can cause anal abscesses. Some other risk factors include:. Toddlers or children that have a history of anal fissures tears in the anal sphincter are also at a higher risk for developing anal abscesses later on. Such anal fissures might occur in children who have a history of constipation.
Do I Have an Anal Pimple, Abscess, Hemorrhoids, or Something Else?
An anorectal abscess also referred to as an anal abscess, rectal abscess, perianal abscess, or perirectal abscess depending on its location is a pus-filled cavity that forms within the furrows of the anal canal called the anal sinuses. As your body tries to control the infection, white blood cells killed in the battle and other bodily fluids start to collect in the tissue, forming a pocket of pus. Abscesses can form near or within the anus or develop much higher up in the rectum itself. While an abscess can form spontaneously for no apparent reason, it is commonly associated with gastrointestinal disease, bowel irregularities, immune suppression, and even certain medications.
The anus is that part of the intestinal tract that passes through the muscular canal of the pelvis and anal sphincters. It is the final orifice through which stool passes out of the body. In adults, the anus is 4 to 5 centimeters long.