A flushing or blushing of the face or cheeks; when the face becomes red from embarrassment, excitement, etc.
発表中に緊張して顔が紅潮した。
I got nervous during the presentation and my face flushed.
彼女の冗談に照れて頬が紅潮しているのが見えた。
I could see her cheeks flush with embarrassment at his joke.
寒さで血行が良くなり、顔が紅潮している。
The cold improved circulation and his face became flushed.