Standard Body Temperature Range Explained
A fever is a common health concern for many, especially in children. Generally, a fever is defined as a temperature of 100.4°F (38°C) or higher [1][3][5].
The normal body temperature range varies slightly depending on the age group and the method of measurement. For older children (ages 11 to 65) and adults, the typical body temperature range is 97.6°F (36.4°C) to 99.6°F (37.6°C) [4]. Younger children (birth to 10 years old) have a slightly wider range of 95.9°F (35.5°C) to 99.5°F (37.5°C) [4].
When it comes to measuring temperature, an oral thermometer that goes under the tongue is the most accurate [2]. For younger children, a rectal thermometer, typically used with infants, is more accurate [2]. Other methods like axillary (underarm), ear (tympanic), and forehead (temporal) readings have slightly lower ranges [1].
It's important to note that fluctuations in body temperature within the normal range are normal and do not necessarily indicate anything significant [6]. However, persistent low-grade or high-grade fevers could signal that something else is going on in the body [7].
Children are more prone to severe fevers due to their developing immune systems [8]. If a child's fever doesn't come down with fever reducers, or if an infant younger than 3 months develops a fever, it's advisable to call your pediatrician [9].
For fevers in children that last more than two days, it's essential to bring them to a doctor's attention [10]. Newer studies suggest that the average person today runs a little cooler, with an average between 97.5°F (36.4°C) and 97.9°F (36.6°C) [3].
In some cases, hypothyroidism, or an underactive thyroid, can lead to a drop in body temperature [11]. For older adults (over 65), the typical body temperature range is 96.4°F (35.8°C) to 98.5°F (36.9°C) [4].
In conclusion, understanding the normal body temperature range and the signs of fever can help in early detection and appropriate treatment. Always consult with a healthcare professional for any concerns regarding body temperature or fever.
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