Can CRP levels help diagnose autoimmune diseases?

CRP levels are a useful marker for detecting and monitoring autoimmune diseases like rheumatoid arthritis, lupus, and vasculitis. Elevated CRP indicates inflammation, which is a hallmark of these conditions. However, CRP alone cannot diagnose autoimmune diseases, as it is a non-specific marker. Doctors typically combine CRP results with other tests, such as antinuclear antibody (ANA) panels or rheumatoid factor (RF) tests, to confirm a diagnosis. Regular monitoring of CRP levels helps track disease activity and treatment effectiveness in autoimmune conditions.