What is the normal body temperature for a newborn baby?
Dec 06, 2022
Source: Cainiu Health
Dr. Ma Yan
Introduction
A body temperature between 36.5°C and 37.5°C is normal for a newborn baby. A newborn's body temperature is typically measured orally, under the armpit, or rectally. Under normal circumstances, a newborn's rectal temperature ranges from 36.5°C to 37.5°C, oral temperature ranges from 36.2°C to 37.3°C, and axillary (underarm) temperature ranges from 36°C to 37.2°C.
A newborn baby's normal body temperature ranges from 36.5°C to 37.5°C, with slightly lower readings under the armpit.
A newborn’s body temperature is typically measured orally, under the armpit, or rectally. Under normal conditions, a newborn’s rectal temperature ranges between 36.5°C and 37.5°C, oral temperature between 36.2°C and 37.3°C, and axillary (underarm) temperature between 36°C and 37.2°C. After birth, babies undergo significant anatomical and physiological changes. Their organs and tissues are not yet fully developed, and their ability to adapt to and regulate responses to the external environment remains weak. With thin subcutaneous fat and a relatively large body surface area, newborns lose heat easily, making their body temperature prone to fluctuations due to changes in ambient temperature.
It is common for a newborn’s temperature to rise after feeding or crying. Therefore, temperature measurements should be taken when the baby is calm and quiet. A body temperature above 37.5°C in newborns is often associated with high room temperature, excessive swaddling, or dehydration. Temperatures below 36°C frequently occur in environments with low room temperature, and are more common among premature infants or those with infections.
If a newborn’s body temperature is too high or too low, it is recommended to seek medical attention promptly to identify the cause and take appropriate measures.
