One of the most difficult conditions to treat, can be seperated between insertional and mid portion tendinopathy, with many sub catagories.
These distinctions are very important, as they are treated very differently. An ultrasound scan is used to help distinguish the type and track progress.
In early stages, specific exercises and relative rest may be enough to reverse sypmtoms. In progressive tendinopathy other interventions like injections may be necassary.