A swollen eyelid is usually a symptom, not a condition. It's very common and is usually due to allergy, inflammation, infection, or injury. The skin of your eyelid is less than 1 millimeter thick. But ...

Most eyelid issues aren’t serious. But if you’ve noticed something’s different about one or both of your eyelids, it’s important to know what to look out for. Faces aren’t even (or “symmetrical”). So ...