A fever is a temporary increase in body temperature, typically in response to an infection or illness. It is usually considered a symptom rather than a standalone condition. A fever is defined by a body temperature above the normal range. A low-grade fever is under 100.4°F (38°C), and a typical fever may be between 100.4°F (38°C) and 102.2°F (39°C). A fever characterized by a temperature of over 102.2°F (39°C) or higher represents a significant elevation in temperature and may need more urgent treatment.
