When I go to sleep, I notice my left eyelid swells and it takes a while to open. I am going to get my usual eye check soon and I will ask, but do you all know why it might happen? I don't think I am retaining water since my rings fit the same. Mainly my left eye, just when I sleep. In a few seconds, it opens fine. Never happens while I am awake. I sleep on my back, head up. Seems like that would be good.