Joint inflammation, also known as arthritis, occurs when the tissues around a joint become swollen and painful. This condition can result from various factors, including injury, infection, or autoimmune diseases, where the body's immune system mistakenly attacks its own tissues. Symptoms often include pain, stiffness, and reduced mobility in the affected joint. There are different types of joint inflammation, such as rheumatoid arthritis and osteoarthritis. Rheumatoid arthritis is an autoimmune disorder that affects multiple joints, while osteoarthritis is typically related to wear and tear over time. Treatment options may include medications, physical therapy, and lifestyle changes to help manage symptoms and improve joint function.