Osteoarthritis (degenerative arthritis): The most common form of arthritis, which affects the joints. It occurs due to the wear and tear of joint cartilage, causing pain, stiffness, and swelling. It frequently affects the knee, hip, and shoulder joints.
Rheumatoid arthritis: An autoimmune disease that causes joint inflammation, leading to pain, swelling, and deformities. It most commonly affects smaller joints, such as the wrists and feet, but can also affect larger joints, such as the knees and hips.
