Many people confuse styes for chalazion and vice versa. Styes are painful, red bumps that form along the eyelid’s edge due to infection. Styes tend to have small pus spots in their middles and cause the entire eyelid to swell. Chalazia rarely cause the eyelid to swell and are not typically painful.
Additionally, chalazia tend to sit further back in the eyelid. Styes can contribute to and cause chalazia growth, but the two conditions are distinct.

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