A high temperature, also known as a fever, is a temporary rise in body temperature, which is usually considered to be 38°C (100.4°F) or higher in adults
. It is a common response from the body's immune system and is often caused by infections, such as colds or flu
. A fever can also be a sign that the body is fighting an infection or illness
. Fevers typically go away when the underlying cause is treated or the infection passes
. It's important to note that normal body temperature varies from person to person and can change during the day
