Osteoarthritis is a degenerative joint disease caused by wear and tear that results in loss of articular cartilage. It commonly affects weight-bearing joints like the knee, hip, and spine. Risk factors include age, genetics, obesity, injury, malalignment, occupation, posture, and footwear. Symptoms include joint pain, stiffness, swelling, loss of range of motion, and crepitus. Diagnosis is based on symptoms and x-ray findings of joint space narrowing, osteophytes, and subchondral cysts. Treatment focuses on non-operative options like activity modification, exercises, weight loss, bracing, and medications. For advanced arthritis, surgical options include arthroscopic debridement