For any sprain or strain, remember RICE: rest, ice, compression, elevation. First, have the patient rest. Next, reduce the swelling by applying snow or a hydration bladder filled with cold water.
Compression: Wrap the ankle in a basket-weave pattern with athletic tape. First, apply an "anchor strip" around the back of the calf. Place another anchor strip under the instep of the foot.
Next, apply the first "stirrup strip" down the calf, over the ankle, under the foot, and back around to the top anchor strip.
Now apply a "horseshoe strip" under the ankle, around the heel, and back around to the bottom anchor strip.
Continue applying stirrup strips and horseshoe strips in an overlapping pattern until ankle is fully supported. Finally, elevate the injury above the heart.