What common sign indicates that a surgical site infection (SSI) may be present after abdominal surgery?

The presence of fever, redness, and swelling at the surgical site is a common indicator of a surgical site infection (SSI) after abdominal surgery. This combination of signs reflects the body's inflammatory response to infection. Fever often signals that the immune system is active, fighting off potential pathogens. Redness at the site indicates increased blood flow, which is typically associated with inflammation and the body's attempt to heal. Swelling can occur as fluid accumulates due to inflammation, which is a natural response to infection. Collectively, these symptoms suggest that the body is responding to an infectious process at the site of surgery, prompting a need for further evaluation and possible intervention. Recognizing these signs early is crucial for effective management and treatment of SSIs.