blushing with embarrassment

Translations
краснеющий от смущения
She was blushing with embarrassment after tripping on stage.
Она краснела от смущения после того, как споткнулась на сцене.
Definitions
A physical reaction characterized by a reddening of the face, often accompanied by feelings of shame, awkwardness, or self-consciousness in response to a social situation or personal mistake.