The itchy and red body of a five-year-old child is considered to be the emergence of atopic dermatitis, papular urticaria, folliculitis and other diseases. 1. Allergic dermatitis, five-year-old children if often contact with allergic substances, may lead to allergic dermatitis, so it will irritate the skin, itchy and red symptoms. 2. Pemphigus urticaria, children if the mosquito bites, may lead to skin stress changes, the emergence of pemphigus urticaria, itchy symptoms, but also with the environment and other factors related to humidity. 3. folliculitis, five-year-old children’s skin by bacterial infection may produce folliculitis, itchy and red symptoms, secondary skin infections will be accompanied by skin pus and blood ulcers and other symptoms. Five-year-old children itchy and red, there may be other reasons, it is recommended to go to the hospital, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.