People with rheumatoid arthritis often have an elevated erythrocyte sedimentation rate
(ESR, also known as sed rate) or C-reactive protein (CRP) level, which may indicate
the presence of an inflammatory process in the body. Other common blood tests look for
rheumatoid factor and anti-cyclic citrullinated peptide (anti-CCP) antibodies.
Your doctor may recommend X-rays to help track the progression of rheumatoid arthritis
in your joints over time. MRI and ultrasound tests can help your doctor judge the
severity of the disease in your body.