I have a pain back of my ankle, the thin edge above the ankle, is that the Achilles heel, I'd defo say its stopping me run and my long 13 mile run is due tomorrow in prep for the London marathon so not sure what to do. Just been outside to try a run and no go after 10 metres. Its started Wednesday on my 7 mile run and was really bad but gets better with each day. Quick google image search shows its the Achilles heel tendon. Any advice please? Been for a run today and its as bad. Gave it 6 days rest but did cycle work etc, worried now as its almost long mileage time for the London Marathon training and im only upto 12 miles and missed this weekends long run.