What is a high fever for an adult?

A high fever for an adult is typically considered to be a temperature of 101°F (38.3°C) or higher. However, it is important to note that a fever is not always a cause for concern, as it can sometimes be a sign that the body is fighting off an infection. However, if a fever is accompanied by other symptoms, such as a severe headache, stiff neck, rash, or shortness of breath, it is important to seek medical attention. Additionally, any fever over 104°F (40°C) should be treated as a medical emergency.