Achilles Tendon

I contiune to get small micro tears or strains in my archilles tendon every 3 or 4 weeks when I run. I run on a compound track but run on my toes unfortunately. I stretch it out before and strenghten it as much as I can with toe lifts, but they still occur. After it happens, I have to take 7-10 days off from running. Would a heel cup help me.Thank-you.
Phil