What is the most common type of arthritis?

Osteoarthritis is recognized as the most common type of arthritis, affecting millions of individuals worldwide. This degenerative joint disease is characterized by the breakdown of cartilage, which cushions the joints, leading to pain, stiffness, and reduced mobility. It can result from a range of factors, including natural aging, joint injuries, and obesity, which places additional stress on weight-bearing joints.

The prevalence of osteoarthritis can be attributed to its association with aging, as the risk increases significantly in older populations. Additionally, lifestyle factors and genetic predispositions can further contribute to its development, making it a widespread condition.

In contrast, the other options—rheumatoid arthritis, fibromyalgia, and metabolic syndrome—represent different conditions. Rheumatoid arthritis is an autoimmune disorder that primarily affects the joints but is less common than osteoarthritis. Fibromyalgia is a chronic pain condition affecting muscles and soft tissues, rather than a joint-specific disease. Metabolic syndrome does not refer to a type of arthritis at all but describes a cluster of metabolic risk factors that increase the risk of heart disease and diabetes. Thus, osteoarthritis stands out as the most prevalent type of arthritis affecting the population.