Children with hives are not contagious to others. Pediatric urticaria is a common pediatric skin disease that is not contagious and is not infectious. Pediatric urticaria is an allergic skin disease that causes dilation of small blood vessels in the skin and mucous membranes and increases vascular permeability, which results in skin damage due to allergic skin reactions. Allergens include pathogenic microorganisms such as bacteria, viruses, and parasites, as well as pollen, dust, chemicals, and specific allergenic foods. The skin may appear as a tinea or tinea-like erythema with varying degrees of pruritus, depending on the degree of individual reaction. Although pediatric urticaria is not contagious, the itchiness that accompanies the onset of the disease tends to cause scratching. To avoid causing infection, allergens should be identified as early as possible to clarify treatment options and prognostically reduce the onset of the disease. Daily attention should be paid to warmth and hygiene, pay attention to hot and cold weather changes to prevent cold urticaria, and reduce outdoor exercise in the season with pollen. Daily diet should be careful to avoid high-protein foods, especially seafood foods. In addition, attention should be paid to choosing loose and comfortable cotton clothing to reduce the irritation to the skin.