>Wish I could find a nice series of illustrations to print out and put in the first aid kit. All I have been able to find online are videos and photos. Videos are useless on the trail and photos are not so clear.
It can be a bit confusing, but even somewhat sloppy wrapping is better than nothing.
The simplest I can explain it is:
First, tape isn't rolled the correct way, makes it very hard to wrap an ankle if you aren't practiced. Coban and ACE wraps are so much easier because they unroll 'over the top instead of from underneath.
Either way- start on the inside of the injured ankle (between your feet) with the running end of the tape, run it over your ankle bone, to the back side of the anklebone and under your foot, midway between your arch and heel, around to the outside of your foot. Now run it up the outside, in front of your ankle and over the top of where your shin turns into your foot. Pass the tape around the back of your achilles, and down over your ankle bone, on the front side.
This makes one complete 'figure 8'. For the rest of the passes, follow the path of the first wrap, but offset the tape by about 1/3 the width. 5-6 passes should cover your entire foot from arch to calf.
If you're using something stretchy like coban or ACE wrap, pull it 3/4 tight, leave some stretch for swelling.
I would personally bring enough coban to do two ankles, or one ACE wrap.
Edit: Dang Posted too soon. An old PA I worked for used to hammer the 'Ottawa Ankle Rules' to do a basic field assessment. They're simple to remember, and don't require a lot of associated medical knowledge.
Essentially strongly suspect a break if any of these cause extreme pain:
1)Squeeze- above the inside and outside of your leg about 2 inches above the bumps that make your ankle (malleolus)
2)Push on the bump that is just below the inside of your ankle (navicular bone)
3)Walk 4 steps un-aided