dirty sanchez guide Normal wear leads to OA, which is one of the most common forms of arthritis. Infection or injury to the joints can exacerbate this natural breakdown of cartilage tissue. If you have a family history of the disease, your risk of developing OA may be even higher. Arthritis is often associated with the elderly, but it can also affect children. In the UK, about 15,000 children and young people are affected by arthritis. Enteric Arthritis - a form of chronic inflammatory arthritis associated with inflammatory bowel disease (IBD), the two most famous of which are ulcerative colitis and Crohn's disease. About one in five patients with Crohn's or ulcerative colitis develop enteric arthritis. The most common site affected by inflammation is the peripheral (limbs) joints and spine.