Chronic inflammatory diseases are conditions where the body's immune system mistakenly attacks its own tissues, leading to prolonged inflammation. Common examples include rheumatoid arthritis, inflammatory bowel disease, and asthma. These diseases can cause pain, swelling, and damage to various organs over time. The exact causes of chronic inflammation can vary, but factors such as genetics, environmental triggers, and lifestyle choices play a significant role. Managing these diseases often involves medications, lifestyle changes, and regular medical care to reduce inflammation and improve quality of life.