Upper eyelid skin constantly changing shape (Photo)

Sometimes my upper eyelid droops and makes my eyelid area look baggy and makes me look older than I am. Other times one of my eyelid creases is noticeably smaller than the other. These changes occur a few times everyday. For example, sometimes when I’m looking down and suddenly look up, my upper eyelid fold droops. But when I’m looking down and raise my eyebrows while looking up, my upper eyelid doesn’t change shape. To add, I wasn’t born with double eyelids but they formed over time.