If you find a stripe-like rash on your child’s arm or leg, you might be concerned. But it might be a harmless rash called lichen striatus. This type of rash usually forms one or two lines of pink, ...

Lichen nitidus is a rare skin condition that causes clusters of bumps on the skin. The bumps appear spontaneously, without an obvious cause. It is not contagious. ‌ The clusters of bumps can show up ...

Those green-blue growths that you see on tree trunks and branches are not mosses. They are lichens. Lichens are not killing your tree, nor are they causing it to fail. They are telling you something ...

What could possibly be inspiring about that green stuff covering Oregon’s trees? What could possibly be inspiring about that green stuff covering Oregon’s trees? Lichen is a an ecological wonder that ...

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Lichen nitidus is an inflammatory condition that causes small, shiny bumps to develop on the skin. It rarely causes other symptoms and does not usually require treatment. The causes of lichen nitidus ...