An anal abscess is a painful condition in which a collection of pus develops near the anus. Most anal abscesses are a result of infection from small anal glands. 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. a perirectal abscess is a collection of pus in the deep tissues surrounding the anus. By contrast, a perianal abscess is a shallower collection of pus under the skin surrounding the anus however, both are sometimes described as an anal abscess. An abscess in the rectal region can be very painful, but the ways of perianal abscess treatment at home are simple and efficient. Follow through with a combination of multiple home remedies to cure the abscess, heal the anus, alleviate the pain and get away with the infection completely. regardless, a ruptured anal gland abscess in dogs is an extremely painful condition. Once the abscess ruptures though, the pain is significantly reduced. See your vet if you have a dog with a ruptured anal gland abscess. Diagnosing a dog with a ruptured anal gland abscess is quite easy. In rare cases fecal particles (hardened) can clog together to block the anal cavity forming abscess inside the anal canal or cavity. More than half of the cases diagnosed with anal fistula would already have abscess. Anal fistula can also occur without an abscess and is found near the skin of the. An abscess is a painful collection of pus, usually caused by a bacterial infection.