A fever is a body temperature of F or greater. Read about causes of fever in adults, symptoms, treatment, medications that may cause fevers, and different types of fevers. Plus, learn how to reduce and prevent fever. Jun 19, · A fever is an increase in your body temperature. Normal body temperature is °F (37°C). Fever is generally defined as greater than °F (38°C). What are common causes of a fever? The cause of your fever may not be known. This is called fever of unknown origin. It occurs when you have a fever above ˚F (°C) for 3 weeks or more.
A fever is a body temperature above °F. A normal oral temperature for a resting, healthy adult is about °F (37°C) (for someone over 70 normal temp is °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. Apr 01, · Fever means a body temperature of ° F (38°C) or higher. An infection, such as the flu, is the most common cause of fever. Other conditions can also cause a fever. These include diseases that produce inflammation, such as rheumatoid arthritis, reactions to drugs or vaccines, and even certain types of cancers. Fever symptoms.
Fever can be tricky in older people because the body may not respond the way it would in younger people. For example, in frail older people, infection is less likely to cause fever. Even when elevated by infection, the temperature may be lower than the standard definition of fever, and the degree of fever may not correspond to the severity of.