A, the pathogenesis of most of the disease mainly by mosquitoes, bedbugs, fleas, lice, mites, midges and other bites caused by allergic reactions. Insects through their mouthparts into the skin to suck blood, their saliva and part of the mouthparts residual skin is the cause of the disease. Second, the clinical manifestations 1, the disease occurs in infants and children, summer and autumn. Sometimes several children in a family develop the disease at the same time. 2, the typical lesion is a green bean or slightly large light red papule, hard in nature, often with a small blister at the top, scratching and crusting, surrounded by a fusiform red halo, scratching after the presentation of the wind mass, the wind mass subsided and still regained its original shape. 3, most likely in the trunk and proximal extremities, the number of damage is variable, often in batches, scattered or a few clusters, often accompanied by gastrointestinal disorders, a few patients sometimes also present blisters. 4, the duration of the disease varies, generally about 1 week more self-fading, leaving temporary pigmentation, but new rashes can appear one after another, so the old and new lesions exist at the same time, until the weather turns cool gradually healed. 5, conscious intense itching, especially at night, often affecting sleep, the child’s mental anguish. After scratching, the epidermis peels off, which can easily lead to secondary infection. Preventive measures Pay attention to personal and environmental hygiene, eliminate fleas, mites, bedbugs and other animals, and limit excessive protein intake. Treat parasites of the gastrointestinal tract. Prevent mosquito bites. After the mosquito bite, avoid scratching, timely treatment. 1, improve the environment, living room and personal hygiene to eliminate the breeding of insects that cause the disease. 2, the residence can be sprayed with insecticide indoors and outdoors to eliminate bedbugs, fleas, mosquitoes and other harmful arthropods. This disease is a common disease in children in spring and autumn, especially after outdoor activities. Paying attention to personal hygiene and environmental sanitation, eliminating mosquitoes, fleas, J, bedbugs, etc., as well as avoiding allergenic food can reduce the occurrence of this disease. Try not to scratch to prevent secondary infection. The rash can naturally subside. The administration of appropriate O|min|k drugs can improve the symptoms and accelerate the rash subsidence. 3, such as the onset of paracetamol, benadryl, etc., can also take Chinese medicine rhinoceros horn poison pill, Saijin chemistry poison san, pediatric fragrant orange pill, etc., local can be applied topically white lotion or bug bite water and other anti-itch agents. If there is secondary infection or long-term failure to heal, you should promptly go to the hospital for treatment. 4, diet avoid spicy stimulation, alcohol, seafood hair, beef, mutton and dog meat, etc.. If you have cosmetic allergy during the period of use, you should use cosmetics carefully to avoid stimulating the skin. Sensitive skin is prone to dryness and peeling, pay attention to the skin hydration, keep moisturized.