Impetigo, commonly known as “yellow water sores,” is the most common bacterial infectious skin disease in children and is highly contagious. The epidemic is often caused in nurseries, kindergartens, primary and secondary schools. When young children return home, they may spread impetigo to their peers. Therefore, once a child with impetigo is found, parents should do a good job of isolating the child to avoid infecting others. The pathogens of this disease are mainly Staphylococcus aureus, group A beta-hemolytic streptococcus, or a mixture of both. Because the skin of young children is delicate, the sebaceous glands are immature, and the skin surface lacks lipid film protection, the resistance to bacteria is poor, and the summer climate is hot and humid, the skin is sweaty, and bacteria can easily multiply. Therefore, children are prone to develop this disease in summer. For mild to moderate limited skin lesions without complications, local treatment is the main concern, and parents can handle it themselves; for patients with extensive skin lesions and systemic infectious complications, children should be brought to the hospital promptly.