I have treated many cases of Achilles tendinopathy (tendonitis) using pulse wave therapy also known as shock wave therapy or extracorporeal shock wave therapy (ESWT).
In 2015, Mani-Babu et al. reported results that there is evidence for short-term improvements in Achilles problems with ESWT.
A 2017 Health Technology Assessment (HTA) review showed efficacy of ESWT for treating Achilles tendinopathy. They showed significant pain improvement while running or playing sports.
For patients with Achilles tendon pain or dysfunction I recommend a trial of therapy. This may involve the use of sound therapy (shock wave, pulse therapy, pulsed EMF, radial therapy) along with light therapy (laser). This is why I call my specialty sound & light therapy. I teach my patients stretches and strengthening exercises for this condition. I also use nutrition and topicals to help patients get out of pain as quickly as possible.