Every summer, the number of patients with insect bite dermatitis increases significantly compared to previous days, with infants and children being the most common. Due to the rising temperature, mosquito activity is becoming more frequent. This is the root cause of the increase in insect bite dermatitis patients. Infants and young children have tender skin and weak resistance, so they are prone to allergic dermatitis after insect bites. Insect bite dermatitis, also known as papular urticaria, is a common childhood skin disease in the summer and fall. There are many insects that cause insect bite dermatitis, the common ones are mosquitoes, bedbugs, fleas, mites, flying midges (small black insects), etc. In addition, some caterpillars, such as mulberry caterpillars, stinging caterpillars poisonous hairs into the skin will also cause the disease. The most common one is the mite, which is very small and ubiquitous in nature, and can cause insect bite dermatitis by directly biting the skin. It can also cause skin inflammation through its feces, saliva, etc. The manifestations of insect bite dermatitis are papules, pemphigus, edematous erythema, blisters, papules, petechiae and petechiae at the bite site. Prickly sucking spots are visible in the middle, scattered or in groups of several. It can occur on all parts of the body and is accompanied by varying degrees of itchiness and tingling sensation. Itchy skin is the most common. Insect bite dermatitis prevention methods 1, eliminate the living environment of mosquito breeding places. It is best not to have pets, if there are pets such as cats, dogs and other animals in the family, which will increase the chances of mites, fleas growth. Don’t place carpets, mats need to be cleaned and treated every day. The bed does not use grass woven products, because the grass woven products easily hide small insects, invisible to the naked eye, when the child’s skin contact, small insects will attack the child, insect bite dermatitis. 2, at play, do not let the baby to grass, bushes, woods, swamps, wet places to play; also do not touch the dust; do not let the body exposed too much when you go out, exposed skin coated with special anti-mosquito lotion for children. 3, sleep in the baby’s crib hanging mosquito nets, but also in the indoor cooperation of electric mosquito incense to repel mosquitoes, it is best not to spray insecticide, must be used, first put the baby outside the house, and so the smell of medicine at home evaporated and dissipated before returning. 4, often clear the environment around weeds, debris; not on the ground directly on the mat to sleep; not in the grass between the forest sit and rest. 5, try to avoid playing outside at dusk when the peak of mosquito activity. 6, should try not to turn on the lights at night, to avoid attracting mosquitoes. During labor or sleep at night try to wear long clothes, long pants, and wear white or light-colored clothes, bright colors are easy to attract mosquitoes, or in exposed parts of the body coated with protective drugs. 7, do not use detergents containing fragrance, skin care products, perfume, shampoo. Because the scent is easy to attract mosquitoes. 8, prevention of insect bite dermatitis but also good personal hygiene, summer sweating, easy to attract mosquito bites, often bathing to remove the body sweat, while the water temperature should not be too high, to 30 degrees Celsius to 40 degrees Celsius is appropriate. 9, to change clothes and bed sheets, mats, bedding and other intimate items should often be washed with warm water exposure. 10, indoor to keep the air circulation, clean environment, to avoid humidity. 11, if the baby is in the mosquito bite, should be given a short nail cut, and tell the baby not to scratch with their hands to avoid scratching the skin; can be applied locally anti-itch agents, such as stove glycolic lotion, cool oil, anthritis, etc.. In case of secondary infection, local and systemic anti-inflammatory treatment should be carried out under the guidance of a doctor; in case of allergic dermatitis, oral antihistamines such as paracetamol and loratadine can be taken. If necessary, you should go to a hospital dermatology department.