Not sure if I currently have Non-insertional Achilles tendinitis or bog standard tendonitis (if there is any difference?), but its been on and off for the last 5 weeks. The tendon can be sore to the touch down the sides and can leave me limping for days/week. I'm stretching and had been taking naproxen (stopped now).
I have no patience though, so as soon as there is a hint of it feeling ok, I go out and within less than a mile i can feeling it pulling and the limping begins and thats me knackered for a week or more.
My new tactic is to stretch, and walk slower and as soon as I feel the hint of a tightening feeling, I slow down. That seems to work. However I'm only going 4-5 miles max as more than that it just breaks down. Its immensely frustrating.