Arthritis is a condition characterized by joint inflammation, which can cause stiffness and pain. There are many different types of arthritis, but the two most common ones are osteoarthritis and rheumatoid arthritis. Osteoarthritis is caused by the wear-and-tear damage to a joint's cartilage, while rheumatoid arthritis is an autoimmune disease in which the immune system attacks the joints, beginning with the lining of the joints
. Other factors that can increase the risk of developing arthritis include age, sex, previous joint injury, and obesity
. Inflammatory arthritis, such as rheumatoid arthritis, is believed to be triggered by a combination of genetic predisposition and environmental factors like viral infections, stress, or smoking
