again, I would emphasize that we should not diagnose on these forums (mmuir), ESPECIALLY based on the "you must have what I have" syndrome. I won't even get into the use of the term "disease"... here's a question, has anyone ever heard of a disease that only affects the achilles tendon? (cough), then it wouldn't be a disease then wouldn't it? disease is a systemic thing.
Therefore, the question is not what can do you do about your tendon getting inflammed as much as what is causing it.
check your shoes, are they high tops? are they rubbing on your achilles? Are you doing a lot of high impact? are your ankles strong enough to take whatever impact your giving them? the way someone diagnosis achilles tendonitis, is they look at it and it is swelling, chronically... and they go, "that must be achilles tendonitis!" in other words, "look, there's inflammation that keeps coming back!"
so again, ask the right questions. not how to cure the trash diagnosis, but what is causing the symptom in the first place. keep your eyes sharp, and stop doing whatever's aggravating it, that easy.