Osteoarthritis (OA) affects aged above 45 years. RF has been used for several painful conditions. There have been a few attempts to use RF current for the treatment of painful conditions of joints of the extremities. It was also used for the treatment of painful conditions of the hip joint.

Osteoarthritis (OA) is commonest chronic arthritis affecting patients usually aged above 45 years. OA decreased health-related quality of life and increased economic costs. Radiofrequency (RF), was used for the treatment of chronic pain unresponsive to conservative therapies. RF has been used for several painful conditions. There have been a few attempts to use RF current for the treatment of painful conditions of joints of the extremities. It was also used for the treatment of painful conditions of the hip joint.

Inclusion Criteria:

• chronic arthritis according to the American College of Rheumatology criteria
• diagnosed radiologically patients in stage 3 and 4, according to the Kellgren-Lawrence classification

Exclusion Criteria:

• other causes of pain such as radiculopathy, neurological disorders, or intermittent claudication.
• patients receive intraarticular steroid or hyaluronic acids during previous three months.
• patients did previous knee surgery.
• Patients with general contraindication to the application of invasive intervention such as hemorrhage, coagulation disorder, systemic infection or local infection.
• patients with other connective tissue disease affecting the knee. And 6-psychiatric disorders.