Achilles Tendonitis & Achilles Tendinopathy One of the challenges we face when someone presents to us with Achilles heel pain problems is they received treatment for Achilles Tendonitis when they have Tendonoses or Achilles Tendinopathy. First, the correct diagnoses needs to be made. Second, the cause needs to be found. Third, the correct treatment needs to be prescribed. Achilles Tendon Inflammation vs. Degeneration The term Achilles tendonitis should be used to refer to inflammation of the Achilles tendon.