Dengue fever is an acute viral disease transmitted by mosquitoes of the genus Aedes. It causes headaches, fever, muscle and joint pain, and a skin rash. The virus is transmitted via several mosquito species, principally Aedes aegypti. Diagnosis is typically made based on reported symptoms and examination in endemic areas. Treatment focuses on fluids, rest, and antipyretics, while monitoring blood counts and pressure. Prevention emphasizes reducing mosquito habitats and using repellents, nets, and protective clothing.