Swollen eye?

About a week ago I noticed that my eye was sore in the crease of my eyelid, where the top of my eye would be. Three days ago it started getting swollen & it’s not super bad sometimes it looks worse & sometimes you can’t notice. But I went to the doctor, they said it’s not a stye, doesn’t look like there’s... show more About a week ago I noticed that my eye was sore in the crease of my eyelid, where the top of my eye would be. Three days ago it started getting swollen & it’s not super bad sometimes it looks worse & sometimes you can’t notice. But I went to the doctor, they said it’s not a stye, doesn’t look like there’s an infection. So i’m just wondering what could be causing this. It’s only my right eye so I don’t think it’s allergies, not sure what it could be.
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