Skin feels hot to the touch, especially the chest or back
Sweating, damp hair, or a flushed face
Rapid breathing
Restlessness, fussiness, or unusual irritability
Sleepiness, lethargy, or being harder to wake
Warm or red skin without another clear cause
Heat rash or small red bumps
Fever of 100.4°F (38°C) or higher
Fewer wet diapers than usual
Signs of dehydration such as dry mouth or no tears when crying
If the baby feels hot but the hands and feet are not the only warm parts
If the baby is overdressed or wrapped in too many blankets
If the room feels warm and stuffy
If the baby’s temperature remains high after removing extra layers
Seek urgent medical care if the newborn has a fever of 100.4°F (38°C) or higher