According to Arthritis.Org, “arthritis” is not a single disease, but an informal way of referring to joint pain or joint disease with increased swelling and/or inflammation. There are many types of arthritis, including Inflammatory Arthritis, Infectious Arthritis, and Metabolic Arthritis. However, the two main types of arthritis are Osteoarthritis (which is the most common), and Rheumatoid Arthritis.
Resource: https://www.arthritis.org/health-wellness/about-arthritis/understanding-arthritis/what-is-arthritis
LIVING WITH ARTHRITIS 