The cause of itchy skin in children is firstly eczema, the child develops itchy skin with inflammatory oozing, edema and so on, usually at a young age, mostly before the age of one year, and this condition is a case of eczema, referred to as milk moss. Because the child is urticaria, often come into contact with abnormal substances, which leads to the symptoms of allergy, the whole body appears to have the manifestation of the wind, and even angioedema, this situation can be due to eating food or due to contact with other substances, such as paint, and so on. In addition, the itchy skin is caused by insect bite dermatitis, which has the skin manifestation of mosquito bites, and has a high incidence of seasons, such as summer mosquito bites, to the park side of the flowers and grasses in the other insect bites, and so on.