A fever is a body temperature above 100.4°F. A normal oral temperature for a resting, healthy adult is about 98.6°F (37°C) (for someone over 70 normal temp is 96.8°F (36°C)). Your temperature can go up or down 1 to 2 degrees throughout the day. Fever is a sign of inflammation or infection and is a common symptom of illness. Fever is not a disease.When is a fever too high?
Fevers over 106.1 F (41.2 C) need medical attention to prevent serious, long-term consequences—including brain damage and death. While high fevers, especially those that are prolonged, can lead to brain damage and death, this is extremely rare.How high of fever is dangerous for adults?
It can also be a sign that a serious medical condition is present. High fevers can also cause confusion and seizures in adults, which also require immediate medical attention. For a recent traveler, a fever as low as 101 degrees F, can be dangerous.