How can we prevent summer dermatitis in children? Summer dermatitis in children is a seasonal disease, mostly seen in the north from June to August, due to the continuous high temperature and high humidity environment, children’s sweat glands are well developed, sweating a lot, and not washed in time. About 99% of the sweat is composed mainly of water, and of the remaining about 1%, half are inorganic salts represented by sodium and potassium, and half are organic substances metabolized by urea, lactic acid, and amino acids. These inorganic salts and organic substances are not substances that normally exist on the surface of the skin, when the water evaporates, these substances will be retained on the skin, the amount of a lot, a long time, it will form an irritation to the skin, resulting in skin inflammation. In addition, after sweating, the skin also tends to adhere to dust mites, and the organic components of sweat accumulate in the skin, which also facilitates the proliferation of microorganisms on the body surface, thus triggering allergic reactions. Summer dermatitis in children is more common in babies aged 6 months-2 years, especially those who are obese. The rash mostly occurs on the extremities, especially on the extremities of the upper extremities, and is symmetrical in onset. The rash is initially corn-sized and may appear as dense erythema, papules or papular blisters with pronounced itching and a burning sensation. The baby often scratches because of itching, so streaks of scratches and scabs often appear on the skin, often leaving hyperpigmentation after they fade. To prevent summer dermatitis in children, the baby must be carefully cared for from all aspects of daily life: 1, ventilation and cooling, to help reduce sweating and sweat evaporation. 2, diligent use of warm water bath, keep the skin clean; external use of prickly heat powder, keep the skin dry, reduce sweat stimulation. 3, wear loose absorbent clothes, and change clothes in time. If the clothes are too snug, the sweat from the skin cannot evaporate.