In clinical cases, the incubation period of dengue fever is usually 1-14 days, and the incubation period of most infected patients is 5-9 days. Dengue fever is an acute infectious disease caused by dengue virus and is one of the most widely spread mosquito-borne infections worldwide, with typical symptoms of fever, rash, headache, muscle and joint pain. Patients mostly develop the disease after 5-9 days, and it is most infectious at the end of the incubation period, and the main sources of infection are infected people and hidden infected people. In China, it is mainly prevalent in the southern regions such as Guangdong, Hainan and Fujian, and is more common in May-November. In the summer and autumn rainy seasons in dengue endemic areas, if a patient suddenly develops high fever, chills, headache, muscle or joint pains, etc., accompanied by hemorrhagic rash and bleeding spots, he should immediately visit the infection department of a hospital for relevant examinations and follow medical advice after clarifying the cause of the disease.