What does a body temperature of 37°C in the morning indicate?
Nov 25, 2025
Source: Cainiu Health
Dr. Ren Yi
Introduction
If there are no other bodily discomforts such as sore throat, fatigue, or cough, a morning body temperature of around 37°C is generally considered normal. Body temperature naturally fluctuates throughout the day and night. The basal temperature in the morning is relatively stable, and 37°C does not exceed the upper limit of the normal range. It may be related to factors such as nighttime sleeping environment and thickness of clothing. A slight change in temperature after physical activity is expected and there is no need for excessive concern.
Under normal circumstances, a morning body temperature of 37°C is at the upper edge of the normal range and is usually within the normal physiological range. However, in a few cases, it may represent an early sign of mild abnormality. If concerned, it is advisable to seek medical advice promptly. The detailed analysis is as follows:
If there are no other symptoms such as sore throat, fatigue, or cough, a morning temperature of 37°C is generally considered normal. Body temperature naturally fluctuates throughout the day and night. Morning basal temperature tends to be relatively stable, and 37°C does not exceed the upper limit of the normal range. It may be related to factors such as sleeping environment or clothing thickness during the night. A slight change in temperature after physical activity is common and not a cause for excessive concern.
If accompanied by mild symptoms such as fatigue, muscle aches, or reduced appetite, one should be cautious of early signs of a minor infection or physical discomfort. In the early stages of certain infectious diseases, body temperature may initially remain around 37°C before gradually rising. In such cases, it's important to closely monitor symptom progression and record temperature fluctuations to assist with later diagnosis.
When measuring body temperature in the morning, ensure proper technique—wipe away sweat under the armpit before taking an axillary reading and remain at rest for at least five minutes prior to measurement. If the temperature consistently remains at 37°C and symptoms worsen, prompt medical evaluation is recommended to determine the underlying cause.
