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. Oct 07, · A fever is one way your body fights illness—your body temperature goes up to kill bacteria that cannot live at the higher temperatures. Although it may not be comfortable, a temperature of up to °F is generally good for you. Most healthy adults can tolerate a fever as high as °F to °F for short periods of time without having problems.
However, older people with a fever are more likely to have a serious bacterial infection than are younger adults with a fever. As in younger adults, the cause is commonly a respiratory or urinary tract infection. Skin and soft-tissue infections are also common causes in older people. Find out more about fever symptoms in adults, when you can use self-care, and what to do if your condition worsens and you need medical help. Find out more about fever symptoms in adults, when you can use self-care, and what to do if your condition worsens and you need medical help.
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. Feb 08, · Fever is usually associated with physical discomfort, and most people feel better when a fever is treated. But depending on your age, physical condition, and the underlying cause of your fever, you may or may not require medical treatment for the fever alone. Many experts believe that fever is a natural bodily defense against infection.