What the color of your snot can reveal about your health
Clear snot is generally a good thing, but too much of it can be a warning that something's brewing.
White snot signals that things are clogged up.
Yellow snot is a sign your body is fighting to keep you healthy.
Green snot is probably an indication that something isn't right.
Red snot doesn't mean you're sick.
Brown snot can be a sign of irritation or pollution.
Black snot might be a reason to call the doctor. Or it could just mean you've been breathing in smoke.
Julia Calderone wrote an earlier version of this post.
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