Introduction Fever is a natural immune response and often a sign of a mild illness, such as a viral infection. However, in certain situations, fever can be a warning sign of a serious, potentially life-threatening condition. Rapid recognition of these “red flag” fevers—especially those caused by meningitis or sepsis—can save lives. This article explains how to identify dangerous fever, the associated symptoms, and when to seek urgent medical care. Serious Causes of Fever 1. Meningitis 2. Sepsis Urgency: Sepsis requires immediate medical attention and hospitalization, often in an intensive care setting. Other Red Flag Situations Immediate Actions for Serious Fever…