DJD, or degenerative joint disease, is a common condition that affects millions of people around the world. It is often accompanied by severe pain, stiffness, and reduced mobility, and can be very disabling over time. There are many synonyms for DJD, including osteoarthritis, degenerative arthritis, wear-and-tear arthritis, and hypertrophic arthritis. Other related terms include joint degeneration, joint erosion, and joint damage. Despite the variety of terms used to describe DJD and its effects, the underlying causes are generally the same: chronic inflammation, excessive wear and tear, and the gradual breakdown of cartilage and bone. Fortunately, there are many treatments available to help manage the symptoms of DJD and improve quality of life for those affected.