You know the old saying: Starve a fever, feed a cold. Or is it Starve a cold, Feed a fever? Either way, it appears that neither is the right answer -- it's never a good idea to starve or overeat during any sort of illness, according to this article from WebMD. What's more, the saying has no scientific evidence to support it and is completely outdated.

That said, when you have a fever, it's a good idea to help your body cope by not filling it with too much food. You probably won't be hungry anyway, but make sure to eat something light to keep your strength up--soup or toast should do the trick. And be sure to get plenty of liquids, no matter what ails you.