What Is High Fever?

A fever is a temporary increase in body temperature, often due to an illness. It is a common sign that the body is fighting an infection. While a normal body temperature typically ranges around 98.6°F (37°C), a fever is generally considered a temperature of 100.4°F (38°C) or higher. A high fever, on the other hand, usually refers to a temperature that exceeds 103°F (39.4°C) in adults. For children, the threshold for a high fever can vary