Dengue fever is a viral illness transmitted primarily by the bite of infected mosquitoes. The disease is caused by the dengue virus, and its clinical presentation is characterized by symptoms such as high fever, severe headache, joint pain, and rash. While many cases are mild, the illness can progress to severe dengue, a life-threatening complication characterized by plasma leakage, severe bleeding, or shock. There is no specific antiviral treatment for dengue, and management remains supportive, focusing on maintaining hydration and monitoring vital signs to prevent the onset of shock. Prevention strategies center on mosquito control measures, as there is no vaccine available for widespread public use.