Perianal Abscess
Infections at the anus are common and can form abscesses.
The anus has numerous glands that are constantly being infected. Normally the infection discharges inside the anus and goes unnoticed. Rarely these infections instead discharge in to the fat of the buttock around the anus and then they can form a painful abscess. Early abscesses can be treated by an urgent course of antibiotics but bigger abscesses require surgical drainage.