A fever of degrees F may require the addition of an over-the-counter fever reducer such as acetaminophen to assist the body in bringing the fever down. But, when an adult's temperature begins to spike at degrees F and above, Banner Health reports, that there may be a cause for concern. Duration of Fever . Adults with fevers of F ( C) or higher will generally look and act sick. The main goal of treatment is to relieve discomfort and help you get rest. To treat a fever at home: Drink plenty .
Adults typically have a fever if their body temperature increases to °F (38°C). This is called a low grade fever. A high grade fever happens when your body temperature is °F (°C) . When is a fever serious? Doctors consider a temperature above °F (40°C) to be a high-grade fever. As a general rule, adults should consider seeking medical attention if their temperature .
Although it may not be comfortable, a temperature of up to °F is generally safe in adults. In fact, most healthy adults can even tolerate a fever as high as °F to °F for short .