Why You Wake Up with “Eye Gunk” — and What It Really MeansWe’ve all woken up with that crusty, yellowish gunk in the corners of our eyes. Casually known as “sleep,” it’s medically called eye discharge — and though it may look unpleasant, it’s actually evidence of your body’s overnight repair work. According to neuroscientist Andrew Huberman, this discharge is made up of mucus, oils, dead skin cells, and the remains of bacteria your body fought off while you slept. In simple terms, it’s the residue of protection — your immune system’s quiet housekeeping shift. During the day, blinking continually...
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