Osteoarthritis: Symptoms, Causes, Diagnosis Osteoarthritis introduction Osteoarthritis is a joint inflammation that results from cartilage degeneration. Osteoarthritis can be caused by aging, heredity, and injury from trauma or disease. The most common symptom of osteoarthritis is pain in the affected joint(s) after repetitive use. There is no blood test for the … [Read more...] about Osteoarthritis: Symptoms, Causes, Diagnosis