A medical emergency is a situation that requires immediate medical attention to prevent serious harm or death. Common examples include heart attacks, strokes, severe injuries, or allergic reactions. Recognizing the signs of a medical emergency is crucial, as prompt action can save lives. In these situations, calling emergency services, such as 911 in the United States, is essential. First responders, including paramedics and emergency medical technicians, are trained to provide critical care on the scene and transport patients to a hospital for further treatment. Quick response can significantly improve outcomes in medical emergencies.