What are some signs that an infant has a fever?

An infant displaying signs of being upset, fussy, and not active often indicates discomfort, which is commonly associated with a fever. When an infant has a fever, they may become irritable and less engaged in their usual activities, which can be a response to the body's efforts to fight off an infection. This change in behavior is a key indicator for caregivers to monitor, as it can suggest that the infant is experiencing pain or discomfort that may require further assessment or medical attention.

Warm palms and feet can sometimes occur in conjunction with fever, but they are not definitive signs alone. Singing and playing happily would typically indicate that an infant is feeling well, while excessive sleeping might suggest sickness, but it is not as specific or direct as fussiness in the context of fever symptoms.