For edema, soak paper towel in apple cider vinegar, wrap lightly with Saran wrap around the swollen area (Not tight enough to stop circulation, be careful, but tight enough to keep the vinegar from running out as much as possible.
Elevated body part affected and leave wrap on and area elevated for about 20 minutes. Take off and swelling should have gone down and will continue to go down after. Works for me every time.
WARNING: BE VERY CAREFUL NOT TO WRAP THE SARAN WRAP TOO TIGHT AS IT CAN WORSEN TO PROBLEM BY STOPPING THE FLUIDS FROM GOING AWAY FROM THE DESIRED AREA, WRAP LIGHTLY.