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What Your Eye Gunk Says About Your Health

In many cultures the auspicious and mythical sandman brings pleasant dreams. The telltale sand he leaves behind is a sign he has visited but no one wants to discover their eyes are sealed shut with discharge and pus in the morning. Rheum, the technical name for the crusty and often sandy discharge that forms by your eyes when you sleep, is generally no cause for alarm. It consists of mucus, oil, dust, cells and other debris. One reason it is found at the corner of your eye is because your...