What are the symptoms of viral hemorrhagic fever?

The main symptoms of viral hemorrhagic fever include the following aspects: 1. Fever: Patients often develop high fever, with body temperature reaching above 39°C. The fever typically lasts for a prolonged period, possibly 1–7 days. Higher fever and longer duration usually indicate more severe disease. 2. Hemorrhage: Bleeding is a prominent feature of viral hemorrhagic fever, manifested as skin petechiae and ecchymosis, commonly found on the face, neck, chest, and other areas. Severe cases may present with nosebleeds, gum bleeding, gastrointestinal bleeding, or even life-threatening complications such as internal organ bleeding and cerebral hemorrhage. 3. Pain and discomfort: Patients often experience the "three pains" — headache, orbital pain, and backache — as well as generalized joint and muscle pain, fatigue, and other discomforts. 4. Symptoms affecting other systems: Viral hemorrhagic fever may also cause respiratory symptoms such as cough, sputum production, and sore throat, and may progress to pneumonia with manifestations including chest tightness, shortness of breath, and difficulty breathing. Neurological symptoms include headache, dizziness, nausea, and vomiting; severe cases may lead to seizures and coma.