Symptoms of dengue include high fever for 2 to 3 days, along with headache and pain under the eyes. If you have these symptoms, find out if it is dengue. Because dengue fever, dengue hemorrhagic fever, and dengue shock can be reported in dengue. This can be life-threatening. Therefore, if you have a fever for two or three days, get tested immediately and get a full blood test. Be especially careful in dengue areas”. Dr. Deepal Perera said.