你因为节食减肥而生病用英文怎么说

可以用 "develop an eating disorder as a result of dieting to lose weight" 来表示。

"Eating disorder" 指的是一类与食物和饮食有关的心理障碍，包括但不限于贪食症，厌食症和暴食症。"Dieting" 指的是为了减肥而节制饮食。

例句：

She developed an eating disorder as a result of dieting to lose weight. (她因为节食减肥而生病了。)
He started to develop an eating disorder after he began to diet to lose weight. (他开始节食减肥后，就开始生病了。)
The pressure to lose weight led her to develop an eating disorder. (减肥压力导致她生病了。)