A fever is a body temperature above A normal oral temperature for a resting, healthy adult is about 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.
What Is the Normal Body Temperature Range?
When is a Fever Dangerous in Adults? | Healthfully
Normal body temperature may change during any given day. It is usually highest in the evening. Other factors that may affect body temperature are:. Fever is an important part of the body's defense against infection. Most bacteria and viruses that cause infections in people thrive best at Many infants and children develop high fevers with mild viral illnesses. Although a fever signals that a battle might be going on in the body, the fever is fighting for, not against the person.
When is a Fever Dangerous in Adults?
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.
This number is only an average. Your body temperature may be slightly higher or lower. A number of factors can influence your body temperature, including your age, sex, time of day, and activity level.