Inclusion Criteria:  presence of heel pain, tenderness at the insertion site of the plantar fascia on the anteromedial aspect of the calcaneal tubercle elicited by palpation, and unresponsiveness to medical treatment.  Exclusion Criteria:  history of inflammatory rheumatic disease, trauma of the foot or foot surgery, local dermatological lesion or infection, impaired peripheral circulation, a neurological disorder such as radiculopathy and neuropathy, patients with sequelae of lower extremity fracture, a congenital or acquired deformity, malignancy, cardiac pacemaker, metal implant at the application site, pregnancy, anticoagulant use for coagulopathy