What is a hallmark symptom of rheumatoid arthritis (RA)?

The hallmark symptom of rheumatoid arthritis (RA) is pain that worsens in the morning. This morning stiffness and discomfort is often a result of prolonged inactivity during the night, and it usually improves with movement as the day progresses. Patients with RA often experience joint swelling and stiffness particularly in the early hours of the day, which can last for more than 30 minutes upon waking. This characteristic morning stiffness is key in differentiating RA from other types of arthritis, such as osteoarthritis, where stiffness typically improves shortly after movement begins. Understanding this symptom is crucial for accurate diagnosis and effective management of rheumatoid arthritis.