Inflammation and Immune Markers

Explore clear, evidence-based guidance on inflammation and immune markers used to evaluate immune activity, autoimmune disease, infection, allergy, joint disorders, and immune deficiency. This category brings together practical explanations of widely used tests such as CRP, ESR, ferritin, fibrinogen, white blood cell counts, ANA, ENA, rheumatoid factor, anti-CCP, ANCA, complement proteins, immunoglobulins, and cytokine panels. Readers can learn how these markers support the investigation and monitoring of rheumatoid arthritis, lupus, Sjögren syndrome, scleroderma, myositis, vasculitis, antiphospholipid syndrome, inflammatory bowel disease, gout, allergies, mast cell disorders, and other immune-mediated conditions. Detailed guides also cover specialized tests for joint fluid, clotting-related antibodies, vaccine response, immunodeficiency, IgE-mediated reactions, T-cell and B-cell function, natural killer cells, interleukins, and hyperinflammatory states. Additional topics include lupus anticoagulant testing, complement pathway activity, allergy component testing, tryptase and histamine markers, flow cytometry, and immune-cell function. Each article explains what high, low, positive, negative, or abnormal results may mean; why reference ranges and testing methods can vary; and how symptoms, medical history, imaging, and additional laboratory findings influence interpretation. The goal is to make complex immune testing easier to understand without oversimplifying its limitations. Whether you are researching a new result, preparing for a medical appointment, or following disease activity over time, this collection provides reliable context for more informed discussions with qualified healthcare professionals.