What is a common sign of infection in patients?

Infection typically presents with specific signs and symptoms that indicate the body's response to a harmful pathogen. One of the most common signs of infection is an increased temperature, also known as fever, which reflects the body's attempt to fight off the infection. Redness and swelling at the infection site are also important indicators, as they suggest increased blood flow and inflammation as part of the immune response. The presence of discharge, which may vary in color and consistency, can indicate that the body is trying to expel bacteria or other pathogens.

These symptoms are a part of the body's natural reaction to an infection, known as inflammation. When tissues are damaged by infection, blood vessels expand to allow for increased blood flow, which brings immune cells to the area to aid in healing. As a result, noticing these signs—especially together—can help identify infections early, allowing for timely treatment.

While the other options may represent symptoms that could be associated with various medical conditions, they do not specifically point to an infection as clearly as the signs detailed in the correct answer. For example, persistent cough and fatigue could be seen in respiratory infections but are not definitive signs of an infection on their own. Similarly, decreased appetite and confusion may point to numerous health issues, including illnesses unrelated to