Swollen eyelids, top or bottom, can have many causes, including allergies, infections ... a clear membrane that lines the inside of the eyelid and covers the white part of the eye.

The infection is generally caused by staphylococcal ... and it's usually located on the edge or the inside of the eyelid, ...

Most cases of the infection will clear up on their own ... However, an internal stye will form on the inside of the eyelid. This might cause your eyelid to become red and swollen.