"Its color comes from white blood cells and other ... of tissues in your nasal passages, he adds. Like yellow mucus, "green ...

She told me that snot is normally clear. It turns yellow or green when our bodies fight germs that can make us sick. Snot is also called mucus. It’s a thin, slippery liquid that covers many of ...

Julia Calderone wrote an earlier version of this post.

A lot of people think yellow or green snot means you need an antibiotic. That is not true. Laura Martin, MD, MPH If it's a viral infection causing the yellow or green snot, yellow in particular is ...

Open your tissue, if you dare. The color of your snot can reveal a lot about your health. Our noses are lined with mucus membranes that secrete snot to help keep our tissues healthy and trap dirt ...