Stye (sty) - Symptoms & causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/sty/symptoms-causes/syc-20378017
WEBJun 14, 2022 · A stye (sty) is a red, painful lump near the edge of your eyelid that may look like a boil or a pimple. Styes are often filled with pus. A stye usually forms on the outside of your eyelid, but sometimes it can form on the inner part of your eyelid. In most cases, a stye will begin to disappear on its own in a couple days.
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