What temperature indicates a medical emergency requiring an ER visit in infants?

The identification of a medical emergency involving infants often revolves around their body temperature since their immune systems are still developing. A rectal temperature of 95°F or lower indicates significant hypothermia, which can be critical for infants. This condition can lead to severe complications since infants are more susceptible to temperature regulation issues. A lower temperature like this requires immediate medical attention because it signifies that the infant's body is not maintaining an adequate core temperature, potentially leading to life-threatening situations.

In contrast, temperatures such as 98.6°F and 100°F are within or just above typical ranges for infants and do not typically represent emergencies. A temperature of 99.5°F is also within a reasonable range and does not warrant an emergency evaluation. Understanding these ranges helps caregivers recognize when an infant's health may be at risk and when to seek immediate care.