What are the symptom manifestations of viral hemorrhagic fever?

The clinical manifestations of viral hemorrhagic fever are diverse and severe, and can be mainly categorized into the following aspects: 1. Fever: Patients with viral hemorrhagic fever often experience high fever, with body temperature reaching above 39°C. The fever may persist for a long duration, typically lasting from 1 to 7 days. The more severe the illness, the longer the fever persists. 2. Hemorrhage: Bleeding is one of the main characteristics of this disease, including petechiae, ecchymosis, epistaxis, gingival bleeding, gastrointestinal bleeding, and in severe cases, internal organ bleeding and cerebral hemorrhage. 3. Pain and discomfort: Patients may experience "three pains"—headache, orbital pain, and lumbago—accompanied by generalized joint and muscle pain, as well as skin pain. 4. Tissue edema: In severe cases, tissue edema may occur, particularly affecting the eyelids and conjunctiva. As the condition progresses, pulmonary edema may develop, accompanied by dyspnea. 5. Shock and renal impairment: Severe cases can present with symptoms of shock, such as hypotension, cold extremities, and tachycardia, which may lead to renal failure. The occurrence of these symptoms is closely related to the severity of the disease. Immediate medical attention should be sought upon the appearance of any related symptoms to avoid delayed treatment.