A low-grade fever in adults is typically defined as a body temperature slightly above the normal range, but below what is considered a fever. According to various healthcare providers, a low-grade fever is generally considered to be between 99.5°F (37.5°C) and 100.4°F (38.0°C) . It is important to note that there is no standard temperature range for a low-grade fever, and the specific range may vary slightly among different sources. In most cases, a low-grade fever is not a cause for immediate concern and may not require treatment with medication, especially if it is mild (less than 101°F or 38.3°C) . However, it is advisable to monitor the fever and seek medical attention if it persists for more than three days, or if it is accompanied by other worrisome symptoms. If the fever rises above 102.2°F (39.0°C), it may indicate a more serious infection and should prompt a visit to a healthcare provider.