Whenever there is a serious injury to the skin that goes untreated, an abscess can form from the resulting infection. That means that pus fills up underneath the skin until it swells into a large pocket. Then, it breaks free, which leaves a painful, open wound. Abscesses can occur anywhere on the body, including next to the anus. Whenever this happens, it is called a perianal abscess. Left untreated, a perianal abscess can result in serious tissue damage. So it is important to understand what causes the condition, some of the symptoms that can occur with it, and how doctors treat it.
Information. The pus that fills up a perianal abscess is the result of the body’s defense mechanism trying to heal the wound. It usually has a dull yellow or white color because it is made up of white blood cells that are attempting to fight off the bacterial infection. Sometimes, it can be other colors though, such as green or brown. The darker that the pus color is, the worse that the infection is. The smell of the pus can also be a sign that medical attention is needed right away because foul-smelling pus has a higher count of bacteria in it. If abscesses with brown pus are not treated right away, the bacteria could reach the bloodstream, which could lead to a systemic infection that is more difficult to treat.