What is typically a sign of local infection?

A lesion containing pus is a classic sign of a local infection. This condition arises when bacteria invade bodily tissues, leading to inflammation and the accumulation of pus, which consists of dead white blood cells, bacteria, and tissue debris. The presence of pus often indicates that the body is mounting an immune response to battle the infection in that specific area.

In contrast, while fever, fatigue, and nausea can also be signs of infection, they tend to indicate a more systemic or generalized response rather than a localized issue. Fever and fatigue often accompany bacterial or viral infections affecting the body broadly, while nausea could result from a variety of causes, including gastrointestinal disturbances, and is not a direct indicator of a localized infection. Therefore, the specific presence of pus-filled lesions is a clear and focused indication of a local infection.