Is 35.8°C considered a low-grade fever in adults?

Generally speaking, a body temperature of 35.8°C in adults is not considered a low-grade fever but rather low body temperature. The detailed explanation is as follows:

Under normal circumstances, the normal armpit temperature for adults ranges between 36°C and 37°C. This range is based on temperature measurements from most people and serves as the standard for determining whether body temperature is normal. A low-grade fever refers to a fever state in which the body temperature is higher than the normal range but below 38°C. A temperature above 37.3°C is considered a fever. A temperature between 37.3°C and 38.5°C is usually defined as a low-grade fever.

Improper use of the thermometer, insufficient measuring time, or inaccurate measurement methods may all lead to lower readings. For example, if the thermometer is not held tightly during measurement or the measuring time is too short, it may result in a temperature reading lower than the actual body temperature. Additionally, prolonged exposure to cold environments can cause excessive heat loss and lead to a drop in body temperature to 35.8°C. Moreover, the body may experience low body temperature due to lack of energy during a state of hunger.

After eliminating measurement errors, the body temperature should be measured again to ensure accuracy. If low body temperature is confirmed and accompanied by discomfort symptoms such as fatigue or drowsiness, warming measures should be taken, such as adding clothing or drinking warm water. If the low body temperature persists along with other symptoms, it is recommended to seek timely medical attention to rule out the possibility of underlying diseases.