Fever is a temporary increase in body temperature, often due to an illness. It is a common medical sign and can be caused by a variety of conditions, ranging from mild infections to serious diseases. Fever is the body's natural response to infection and is part of the immune system's attempt to eliminate invading pathogens. Overexposure to high temperatures or strenuous physical activity in hot weather. Some antibiotics, anti-seizure medications, and drugs used to treat high blood pressure. Fever is characterized by an elevated body temperature, typically above the normal range of 98.6°F (37°C).
