Elevated temperature (above 100.4°)
The medical community generally defines a fever as a body temperature above 100.4 degrees Fahrenheit. A body temp between 100.4 and 102.2 degree is usually considered a low-grade fever. 

Flushed complexion or hot skin.
Flushed skin is often a visual sign of embarrassment, anxiety, or being too hot. However, frequent flushing can sometimes indicate an underlying medical condition. Flushed skin occurs when the hundreds of tiny blood vessels just beneath the skin dilate, or widen.