A fever is a common side effect of illness like the flu. It happens when there is a temporary rise in body temperature. A fever is usually a sign that your immune system is busy fighting an infection or other illness. In babies and toddlers even a slight fever may be a sign of a serious illness. In adults a fever is not usually serious or life-threatening. However, sometimes a fever in adults can be a warning signal that something is not right.
Fever in Adults - Infections - Merck Manuals Consumer Version
Fever is an elevated body temperature. Temperature is considered elevated when it is higher than Although It is lowest in the early morning and highest in the late afternoon—sometimes reaching Similarly, a fever does not stay at a constant temperature. Sometimes temperature peaks every day and then returns to normal.
Causes and treatment of a persistent low grade fever
The average body temperature is But "normal" body temperature varies from person to person. It also changes during the day, rising a bit after you eat or exercise. Body temperature is often higher in the afternoon than it is when you wake up in the morning. Fever means a body temperature of
A fever is a temporary increase in your body temperature, often due to an illness. Having a fever is a sign that something out of the ordinary is going on in your body. For an adult, a fever may be uncomfortable, but usually isn't a cause for concern unless it reaches F For infants and toddlers, a slightly elevated temperature may indicate a serious infection.