One of the ways to reduce edema and improve a problem with Venous Insufficiency is to elevate the legs as much as you can.
If you sleep in a standard bed, Put a small brick, or a small square of wood, (like a piece from a 2×4) and place it under the foot of the bed. This will raise the bed by around two inches. This will allow your legs to drain fluid at night while you sleep. Pillows are not recommended, as they move around and often end up under your knees. That makes the situation worse.
For those of you who are sleeping on your recliners, do not fool yourself into thinking your legs are elevated enough. While they are up, they need to be above the level of your heart. Most recliners don’t go back that far.