Which symptom is commonly associated with Rheumatoid Arthritis?

Rheumatoid Arthritis (RA) is characterized by specific symptoms that reflect the inflammatory nature of the disease. Stiffness and swelling are hallmark symptoms associated with RA and are primarily due to synovitis, which is the inflammation of the synovial membrane surrounding joints. This inflammation leads to the accumulation of synovial fluid and subsequent joint swelling. Morning stiffness is particularly notable in RA, often lasting for more than an hour. The swelling is usually symmetric, affecting the same joints on both sides of the body.

In contrast, increased mobility and enhanced strength are not symptoms of RA; rather, they are typically not observed in individuals with this condition due to the pain and stiffness that limit movement. Redness without swelling can occur due to other conditions, but is not characteristic of RA, where swelling is consistently present. Thus, stiffness and swelling accurately reflect the symptoms experienced by patients with Rheumatoid Arthritis.