What is causing my right eyelid to be swollen and develop more creases? (photo)

I usually have tapered eyelids but recently my right eyelid has been swelling up and flipping wrong, another crease has developed on it (or I think it was always there, it just somehow got bigger) and now my eye isn't sure which crease to flip to. In the first picture it's my swollen eye and the second is my regular left eye. What's wrong, how can I fix this?