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Most styes are harmless and will clear up on their own in a couple of weeks, but you shouldn’t self diagnose.
If it’s a stye, the skin around it may be swollen and red and the stye may be filled with yellow pus. The redness may be harder to see on brown and black skin.
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Your eye may be red and watery but your vision should not be affected, and styes usually only affect one eye but it’s possible to have more than one at a time.
The NHS site recommends seeing your GP if the stye is very painful or swollen or impacts your vision.
Source: Daily Express