Oct 07, 2018 · 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.
Fever in Adults - Learn about the causes, symptoms, diagnosis & treatment from the Merck Manuals - Medical Consumer Version. An infectious cause is highly likely in adults with a fever that lasts 4 days or less. A noninfectious cause is more likely to cause fever that lasts a long time or returns.
Jun 19, 2019 · A fever is an increase in your body temperature. Normal body temperature is 98.6°F (37°C). Fever is generally defined as greater than 100.4°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 100.9˚F (38.3°C) for 3 weeks or more.
Apr 01, 2015 · Fever means a body temperature of 100.4° 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.
Jan 01, 2019 · Your fever has lasted for more than three days. When should I seek emergency help? In some cases, a fever can be an emergency situation. For instance, a fever that climbs above 106 degrees can cause a coma or brain damage: If you have a 106 degree fever, call Author: Chris Woolston, M.S.