Dengue fever is an acute infectious disease caused by the dengue virus, transmitted by Aedes aegypti mosquitoes, mostly occurs in summer and fall on rainy days, the main symptoms are sudden onset of fever, chills, rash, headache, orbital pain, as well as generalized muscle, bone and joint pains, accompanied by flushing of the face, neck, chest, conjunctival congestion, lymph node enlargement, extreme fatigue. It is spread among people through mosquito bites. It is not transmitted directly from person to person through the respiratory tract, digestive tract or contact, etc. It is one of the most widespread insect-borne viral diseases among humans today. The incubation period of dengue fever is 3~14 days, i.e. the patient usually develops the disease within 3~14 days after mosquito bite. Dengue fever main symptoms 1, high fever: sudden high fever, usually lasts 3~7 days, body temperature can be up to 39 ℃ or more. 2.Three pains: mainly severe headache, orbital pain, joint muscle pain. 3.Rash: Skin may have measles-like, scarlet fever-like, leukoplakia-like, urticaria-like and other rashes. 4.Others: Positive bundle arm test or bruise spots, small amount of bleeding from skin, gums, nasal cavity, fatigue and gastrointestinal symptoms such as nausea and vomiting. Warm tips for dengue fever prevention 1. Seek medical advice in time if there are suspicious symptoms. 2. Eliminate mosquito breeding places. Such as overturning pots and cans, remove stagnant water, try to avoid using water to raise flowers and plants; for bottles, cans and pots with stagnant water, at least once a week to clean and change the water, do not let the pots and sumps leave stagnant water. 3, the family in accordance with the requirements of the instructions for the use of household insecticides to kill adult mosquitoes. 4, strengthen personal protection, if the indoor air-conditioning equipment, should hang mosquito nets or install anti-mosquito nets, outdoors can be coated with mosquito repellent. 5, to avoid the “flower mosquito” frequent infestation time in the shade, bushes, pavilions and other outdoor shady places to stay. Avoid entering dengue-endemic areas. If you travel or live in dengue fever endemic areas, you should wear long-sleeved clothes and long pants, and apply mosquito repellent drugs on your exposed skin and clothes. 7. Cooperate with the relevant departments to carry out emergency mosquito control in epidemic spots and areas.