I recentlyh had tendonitis of the achilles. My podiatrist gave me a boot to wear at night when I sleep. Also, I had a new set of custom orthodics made and - most importantly - stopped wearing the shoes that caused the problem. My insurance covered the cost of the sleeping boot. The achilles tendon is something you do NOT want to fool with. Please follow your MD's instructions. Get better fitting shoes. Shoes with an achilles notch should help a lot.