I went on WebMD hope this helps:
Tendinosis. This refers to tiny tears (microtears) in the tissue in and around the tendon caused by overuse. In most cases Achilles tendon pain is the result of tendinosis, not tendinitis. Some experts now use the term tendinopathy to include both inflammation and microtears. But many doctors may still use the term tendinitis to describe a tendon injury.
Treatment for mild Achilles tendon problems includes rest, over-the-counter pain medicine, and stretching exercises. You may need to wear well-cushioned shoes and change the way you play sports so that you reduce stress on the tendon. Early treatment works best and can prevent more injury.
Even in mild cases, it can take weeks to months of rest for the tendon to repair itself. Itís important to be patient and not return too soon to sports and activities that stress the tendon.