But why is it so hard to tell if your own home smells bad? That’s because, after a while, you stop noticing it. There’s even ...

Phantosmia is a condition where people perceive smells that aren’t present Learn about symptoms causes and treatment options ...

or produces yellow-green or gray mucus Discharge from the nose that has a bad smell, comes from only one side, or is a color other than white or yellow More throat pain, or white or yellow spots ...

Joy Milne’s life has changed immeasurably since the day she ambushed an eminent stem-cell biologist at a talk in Edinburgh, ...

Humans can usually tell the difference between about 10,000 different smells. But if they’ve got a bad cold, all that snot blocking their nose might stop them from being able to smell at all.

Your sense of smell often alerts you to potential danger. Bad smells can serve as a warning that something is amiss. If it smells bad, it is probably bad for you. More often than not, the nose knows.