Prickly heat is a rash that often appears on people’s skin in the summer. Although it is common and not a serious problem, it can often have a serious impact on the quality of life for infants and young children. Prickly heat can make children’s skin itchy, irritable and restless, and can irritate them even more when they sweat or when the ambient temperature is too high. If parents don’t handle it properly, it can lead to secondary infections and sepsis in severe cases. Prickly heat, also known as sweat rash and corn rash, is a perihidrosis caused by high temperatures and high humidity, which leads to blockage of sweat ducts and subsequent rupture of the skin around the sweat glands. To deal with prickly heat, first of all, attention should be paid to lowering the indoor temperature, preferably at 24-26°C. Also pay attention to ventilation. In summer, you can use air conditioning for your baby, but be careful not to blow against it, and pay attention to hydration. Secondly, in summer, we should give the child a warm bath diligently, it is best to wash twice a day if possible, to keep the skin dry and clean. Then be careful not to let your child play in the hot sun. Wear sweat-absorbing, spacious and breathable thin cotton clothes and pants when you go out. Wear a sun hat, and sunglasses for infants over 6 months of age. Infants and toddlers who use diapers should choose diapers that are breathable and thin, and change diapers regularly, preferably intermittently. When children sweat from playing or sweat excessively in high heat, they should be dried at any time and changed out of wet clothes in time. If you don’t change clothes or wipe off sweat in time, your child’s tender skin will be soaked with sweat for a long time, leading to sweat gland occlusion, and sweat cannot be discharged smoothly, so more heat rash will grow. Infants should not be held all day, such as sleeping in bed to turn the baby over. Finally, for children who already have prickly heat, you can use a topical glycolic lotion and avoid hand scratching to prevent infection. Cut your child’s nails regularly so that he or she does not get infected by scratching. For children who are already infected, parents should take them to the hospital in time.