“脸发红发热”可以翻译为 “one's face turns red and feels hot” 或者更简洁地表达为 “one's face flushes（with heat）” 。
例如：
Whenever she was embarrassed, her face would turn red and feel hot.（每当她感到尴尬时，她的脸就会发红发热。 ）
He flushed with heat after running up the stairs.（跑上楼梯后，他脸发红发热。 ）