Diagnosis relies on the doctor's physical examination, as well as the patient having localized pain and restricted movement, with definite tender points. Moreover, if local symptoms are atypical, an X-ray can be performed to rule out other conditions such as osteoarthritis, or bone hyperplasia, allowing for a localized diagnosis. In addition, localized symptomatic treatment can be administered, and if there is improvement, it can indirectly confirm the diagnosis of tendinitis. Typically, when there is localized pain with significant movement restriction, and apparent pain and hyperplasia at the tendon's central axis, a clear diagnosis can be made.