[jyl]

By "breaking a fever" I mean going to bed all bundled up (i.e. pajamas, bathrobe, lots of blankets) and staying that way even after the chills pass, even after you're hot and sweaty. Usually I wake up the next morning, wet with perspiration and feeling drained, but fever is gone.

I think this is sort of an old wives' remedy, I do it by accident (go to bed all bundled up because feel cold, then simply never bother to remove any layers before falling asleep). I don't know if it really works, or if the fever simply runs its course in 12 hours regardless, or if fevers tend to go away in the morning anyway.