Summer is the season of skin diseases due to high temperature and high humidity, and children’s delicate skin is more vulnerable to various germs. Cooler dermatitis is one of the most common diseases in children in summer. There are two reasons for the appearance of mat dermatitis symptoms: 1, the child is allergic to the reed, grass and other plants woven into the mat, the symptoms are red spots on the skin and mat contact; 2, is the bite of mites present in the seams of the mat, the child’s body appears a patch of papular rash, medically known as papular urticaria, also belongs to a kind of mat dermatitis. How to prevent mat dermatitis? First of all, you should choose a good quality mat, the best choice of bamboo or rattan mats, do not choose grass mats, because grass mats are prone to mites, grass mats themselves are also allergens. Second, to keep the mat clean and hygienic. Before using the mat, the mat should be disinfected at high temperature (such as scalding with boiling water) and then put under the sun, so that the mites and their eggs, which are not easily visible to the naked eye, can be killed. In addition, the human body is prone to sweat in summer, dander and dust are easy to enter the seams of the mat, coupled with the humid environment may also breed mites, so the mat should be frequently cleaned and dried.