Besides ice, what else can be used to treat tendonitis?

See below.: Heat, rest, anti-inflammatory medications, strappings, immobilization, orthotics, more supportive shoes. Of course the exact treatment may vary depending on which tendon is affected as well as the severity of problem.

Depends: Treatment of tendonitis will depend on body part for sure. First of all how did you get it in the first place? If upper body you could have imbalance of muscles groups or faulty mechanics if a overhead or racquet sport. If lower body-muscle imbalance, alignement, foot wear, etc. Find out the cause and one you know this you can hopefully prevent it.

Many Possibilities: Prolotherapy typically by itself will cause ligaments to tighten up, usually due to scarring or fibrosis of the ligaments. However now prolotherapy is used to introduce new blood supply to the area and then many times following it with the prp and/or stem cells in the area can repair the tissue/ligaments by the hopes that the stem cells regenerate the same normal tissue type. Regenexx.Com