Is 37.5°C considered a fever?
Generally, if the temperature is measured orally or under the armpit, a reading of 37.5°C is usually considered a fever. However, if the temperature is measured rectally, 37.5°C is typically within the normal range. Specific details are as follows:

Under normal circumstances, an oral temperature exceeding 37.3°C is classified as a fever. A temperature of 37.5°C falls within the low-grade fever range, which is defined as 37.3–38°C. Therefore, if the temperature is measured orally, 37.5°C does indicate a fever. The normal temperature range under the armpit is 36–37°C. A temperature exceeding 37°C, with a daily fluctuation of more than 1°C, is generally considered a fever. Hence, an armpit measurement of 37.5°C also qualifies as a fever and falls within the low-grade fever category. The normal rectal temperature range is 36.5–37.7°C. Therefore, a rectal temperature of 37.5°C is not considered a fever and remains within the normal body temperature range.
Individuals with a low-grade fever can adopt physical cooling methods, such as applying fever patches or wiping the body with lukewarm water. Fever can lead to fluid loss in the body, so it's important to drink plenty of water to stay hydrated. The body also requires additional rest during a fever to aid recovery. If the fever persists or is accompanied by other symptoms, it is advisable to seek timely medical attention for diagnosis and treatment.
In daily life, it's important to ensure sufficient sleep and follow a diet that is light, nutritious, and easy to digest, which benefits the body's recovery.