“头疼脑热”常见的英文表达是 “minor ailments like headaches and fevers” ，不过在更口语化、日常的表达场景中，也可以简单说成 “headaches and fevers” （头疼和发热这类小毛病） 。
例如：
Don't worry too much about these minor ailments like headaches and fevers; they'll pass soon.（别太担心这些头疼脑热的小毛病，它们很快就会过去的。）
I've been having some headaches and fevers lately, but I think it's nothing serious.（我最近有点头疼脑热，但我觉得没什么大碍。 ）