What are the initial symptoms of hemorrhagic fever?

Patient's question:

Recently, I don't know why I've been having high fever that won't go down. The hospital said it's a viral infection. What kind of infectious disease did I get? What are the initial symptoms of hemorrhagic fever?

Doctor's answer:

The symptoms of hemorrhagic fever in the early stages are very similar to a cold, resembling a severe cold. Within hours of onset, the body temperature rises rapidly to above 40°C, accompanied by a recurrence of chills and sweating. Starting from the third day of illness, symptoms such as abdominal pain, nausea, vomiting, and dry heaving may appear. By the third or fourth day, the body temperature begins to drop, and by the fourth day, varying degrees of skin manifestations may reappear, such as nosebleeds, blood vomiting, hematuria, and bleeding gums, among others.

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