Is an armpit temperature of 37.3°C considered a fever?

　　The standard medical term for "发烧" is fever. Generally, if an axillary (underarm) body temperature of 37.3°C is caused by pathological factors, it is considered a fever and falls within the low-grade fever range. However, if the fever is caused by physiological factors such as hot weather or intense physical activity, it may not be classified as a true fever. If any abnormalities occur, it is recommended to seek timely medical attention. Detailed explanations are as follows:

　　Normally, the axillary body temperature in humans ranges between 36°C and 37.2°C. A temperature of 37.3°C exceeds this normal upper limit. At this point, symptoms such as dizziness, fatigue, headache, and muscle aches may appear, possibly indicating an underlying condition such as infection or allergy. Close monitoring of body temperature is necessary, and measures such as physical cooling may be considered. Medical evaluation may also be required.

　　However, in hot weather or after intense exercise, the body's metabolic rate and blood circulation increase, which may cause a slight rise in axillary temperature, reaching 37.3°C or slightly higher. This type of temperature elevation is usually temporary and tends to return to normal after appropriate rest and adjustment.

　　In daily life, maintaining a healthy lifestyle, improving dietary habits, engaging in appropriate physical exercise, enhancing physical fitness, and reducing susceptibility to illness are all recommended.