An abdominal abscess is a localized collection of pus within the abdominal cavity, most often caused by bacterial infection. Onset can be gradual or rapid, and clinical presentations differ by site and size, but several typical features are usually present. Fever and chillsA swinging or spiking fever is common, frequently accompanied by chills or rigors as the body responds to ongoing infection . Abdominal painPersistent, deep-seated pain is the hallmark. It may be dull or sharp, localized or diffuse, and often intensifies on movement, coughing, or palpation . Gastro-intestinal upsetNausea, vomiting, loss of appetite, and sometimes constipation are frequent associated... Learn more