Well, droopy eyelids happen to many people, and they can be very common to many people. But on the other hand, droopy eyelids can make you look tired and older. And there are many causes of droopy eyelids, such as weak levator muscle, paralysis of some nerves. To treat it, there are some ways you can have a try. First, you can try some tea bags which can be effective on eyelids. In my opinion, you can just put the teabags in the refrigerator until these become cool, and then just apply them on your eyes. Repeat this for a few days. Also, keep the proper water intake, and it can prevent droopy eyelids. By the way, stop rubbing your eyes, for that will lead to droopy eyelids. Anyway, just have a try.