When a character is really embarrassed and their whole face blushes, rather than just the cheeks.
It's not a full-face blush if it doesn't extend any higher or lower than the cheeks. The blush should reach at least as far up as the forehead and as far down as the mouth.
If it doesn't reach up or down, but it extends inwards to the nose, use nose blush instead of this tag. If it extends outwards to the ears, use ear blush instead of this tag.
