What characterizes a constant fever?

A constant fever is characterized by a relatively stable rise in body temperature that remains elevated above the normal range without significant fluctuations. This means that while the temperature may vary slightly, it primarily stays above the normal threshold without returning to baseline levels.

In contrast, if body temperature fluctuates above normal, it suggests that there are periods of both elevated and lower temperatures, which is indicative of a different type of fever, such as intermittent fever. A constant fever does not involve maintaining a temperature below normal, so any option indicating that the body temperature remains below normal is not applicable. Furthermore, if the temperature fluctuated within the normal range, this would not constitute a fever either. Lastly, having a body temperature fixed at a single degree would suggest a specific scenario that does not align with the concept of a constant fever, as this is typically indicative of a more severe and possibly life-threatening condition, rather than a constant state of fever. Thus, the best characterization of a constant fever aligns with maintaining an elevated temperature above the norm.