Achilles Tendonitis What is Achilles Tendonitis? Pain in the back of the heel is referred to as Achilles Tendonitis or Achilles Tendinopathy. The Achilles tendon runs from the calf muscle into the back of your heel bone. When inflammation and micro-tears in the tendon occur this is what causes Achilles Tendonitis. There are many factors … Continue reading Achilles Tendonitis