This document provides guidance on evaluating a child presenting with fever and rash. It describes the key characteristics of fever and rash, important aspects of history and physical exam, and the differential diagnosis for common infectious and inflammatory causes of fever and rash in children. These include viral illnesses like measles, chickenpox, rubella, scarlet fever, dengue fever, and typhoid fever, as well as bacterial infections like Kawasaki disease, systemic lupus erythematosus, and infectious mononucleosis. Diagnosis and treatment options are outlined for each condition. A thorough history, physical exam focusing on rash characteristics, and diagnostic testing can help identify the underlying cause.