A normal body temperature isn't a single number, but rather a range. While 98.6°F (37°C) is often cited as the average, a healthy individual's temperature can fluctuate.
Understanding the Normal Range
Multiple reputable sources indicate that a normal body temperature for adults falls within a range of 97°F (36.1°C) to 99°F (37.2°C). This range accounts for individual variations and factors like time of day and activity level. For children, the normal range is slightly different; WebMD states that it's between 95.9°F and 99.5°F. (WebMD). The Cleveland Clinic similarly states that 97 to 99 degrees Fahrenheit is considered normal. (Cleveland Clinic). It's crucial to remember that this is a general range, and individual variations exist.
- Factors influencing body temperature: Age, activity level, time of day, and even the method of measurement can slightly alter readings.
- Beyond the average: Focusing solely on 98.6°F can be misleading. A temperature within the broader range mentioned above typically indicates good health.
- Fever threshold: Temperatures consistently exceeding 100.4°F (38°C) usually signify a fever, often due to illness or infection.
Several studies, including those cited in the provided references, have investigated the nuances of normal body temperature, highlighting the considerable individual variation that exists. (MedlinePlus, Mayo Clinic, Hopkins Medicine, NCBI Bookshelf, BMJ) This highlights the importance of considering the overall health picture rather than fixating on a single temperature value.
