Background: Back pain is a common problem and a main cause of disability. Facet Joint Arthritis (FJA) is the common cause of Low Back Pain (LBP). The study aimed to determine the incidence of FJA in patients suffers from low back pain. Methods: 50 participants with low back pain were examined at the Orthopedics Clinic of Orthopedic Department in Al-Zahrawi Hospital. Those diagnosed with FJA. We described an Extra-Articular Block (EAFB), and follow up for three months. Results: BMI of patients, distribution, and type of pain, levels affected, and radiological abnormalities showed a significant association with FJA. Conclusions: FJA can be diagnosed clinically, and radiologically. Confirmation of the diagnosis can be done either by local injection, and/or medial branches blocks.