faint, slight
deep, pink, red
sudden
a sudden flush of rising excitement

hot (BrE) (hot flash in AmE)
Hot drinks can cause hot flushes.

feel
She felt a flush of anger creeping into her face.

bring
The promise in his voice brought a deep flush to her cheeks.

creep, rise, spread, suffuse sth
A flush of embarrassment rose to her cheeks.

flush in
She had a slight pink flush in her cheeks.

flush of
There was a faint flush of red on those pale cheeks.

the first flush of enthusiasm, passion, youth, etc. (= a time when enthusiasm, etc. is new, exciting and strong)
I'm no longer in the first flush of youth.

deeply
a little, slightly, etc.
angrily, guiltily
He made his excuses, flushing guiltily.

in
Her face flushed in anger.

with
He flushed scarlet with embarrassment.

flush red, scarlet, etc.