Is 37.4°C considered a low-grade fever?
Jan 18, 2023
Source: Cainiu Health
Dr. Guo Xiheng
Introduction
Whether 37.4°C constitutes a low-grade fever depends on the site of measurement. Generally, an axillary (armpit) or ear temperature of 37.3°C or higher is considered a low-grade fever, whereas a rectal temperature must be at least 37.8°C to be classified as such. However, if fever symptoms are present, it is advisable to promptly initiate fever-reducing measures and take antipyretic medications under a doctor's guidance.
A body temperature of 37.4°C may or may not be considered a low-grade fever, depending on the site of measurement. Generally, an axillary (underarm) or ear temperature greater than or equal to 37.3°C is classified as a low-grade fever, whereas a rectal temperature must be greater than or equal to 37.8°C to be considered a low-grade fever. However, if fever-related symptoms are present, timely measures to reduce fever are recommended, including taking antipyretic medications under a doctor's guidance.
Under normal circumstances, the typical human ear temperature ranges from 36.3°C to 37.2°C, axillary temperature from 36°C to 37°C, and rectal temperature from 36.5°C to 37.7°C. Therefore, a rectal temperature of 37.4°C usually does not qualify as a low-grade fever and generally requires no special treatment—there is no need for excessive concern. However, if the axillary or ear temperature is 37.4°C, this falls within the range of a low-grade fever.
A low-grade fever is a common symptom defined as a body temperature between 37.3°C and 38°C. Some patients may experience symptoms such as coughing, fatigue, night sweats, or sweating upon waking, which can be related to infectious, non-infectious, or functional factors. However, a temperature of 37.4°C might also result from non-pathological causes such as emotional stress, menstruation, vigorous physical activity, or exposure to high ambient temperatures. In such cases, body temperature typically returns to normal gradually after emotional regulation, completion of the menstrual cycle, rest, or removal from a hot environment.
If the low-grade fever is caused by pathological conditions, prompt medical evaluation is advised, and treatment should be administered according to medical guidance. Individuals with a temperature of 37.4°C should get adequate rest, consume light and easily digestible foods, drink plenty of warm water, and use physical cooling methods such as tepid sponge baths. If body temperature continues to rise above 38.5°C, antipyretic medications such as acetaminophen (paracetamol) or ibuprofen should be taken as directed by a physician.
