An elevated temperature may be a sign of what condition?

An elevated temperature is often indicative of an underlying infection within the body. When the immune system detects pathogens such as bacteria or viruses, it responds by increasing body temperature through a physiological process called fever. This elevated temperature is a defense mechanism aimed at creating an environment that is less favorable for the growth of these harmful organisms, while also enhancing the immune system's efficiency.

Infections, including those caused by common illnesses like the flu or more serious conditions such as pneumonia, can lead to notable increases in body temperature. While conditions like cancer can sometimes result in fever as well, especially in cases of certain tumors or infections associated with cancer, the direct and prevalent association of fever with infectious processes makes it the most relevant choice in this context.