Papular urticaria, as the name suggests, is a rash that looks a bit like hives, a small bumps that look like windbags, the size of a green pea to a peanut, some with a small blister on top. Children are prone to this disease and often find scattered or piles of small bumps on their arms and legs. They feel very itchy, and sometimes the child is so itchy that he or she cannot sleep. Vigorous scratching can also lead to secondary bacterial infections. Papular urticaria is often associated with small insect bites, such as mosquitoes, bedbugs, fleas, and mites, which can cause the disease in children. The reason is that after being bitten by insects, the body is allergic and caused by it. Because there are more mosquitoes and insects in the spring and autumn, papular urticaria is more common in the spring and autumn.