Osteoarthritis and arthritis are different. Firstly, osteoarthritis refers to degenerative changes in the joints, mainly caused by aging and chronic strain, leading to damage to the joint cartilage. This results in symptoms such as joint pain, swelling, and limited mobility, which are characteristics of osteoarthritis. The scope of arthritis, however, is broader. Depending on the cause, arthritis can be divided into many types, including osteoarthritis, which is a type of arthritis. Other types include septic arthritis, rheumatoid arthritis, and gouty arthritis. Therefore, there is a distinction between the two. Arthritis covers a wider range, while osteoarthritis is simply a type of arthritis that involves the bones.