Question: When Should I Be Concerned About My Child’s Fever? Answer: First it is important to know what a true fever is. A child 0 to 3 months old: A true fever for this age is 100.4˚F. If your infant does have a fever of 100.4˚F or above they should be taken to the ER … Continue reading “Ask the Nurse: When Should I Be Concerned About My Child’s Fever?”