Children’s eyelids are red and swollen, usually for the following reasons: 1, caused by mosquito bites, which can cause limited skin redness of the eyelids. Especially in the summer, mosquitoes can bite the child’s skin, and the child’s bite can cause itching, which can easily cause eyelid redness and swelling after rubbing the eye; 2. Children have wheals in their eyes because some children have impingement and inflammation in their eyes, and children like to rub their eyes with their hands. This is when parents find that their child’s eyelids are red, swollen and painful when pressed, usually because the child has a wheal or chalazion; 3. Conjunctival inflammation, some newborn babies have inflammatory infections during delivery through the birth canal or inside the uterine cavity. This is a common cause of eyelid redness and swelling in children. 4. Because allergies are now common among the population, especially in the spring, summer or autumn and winter seasons, it is easy to cause allergic reactions in children. In children with eyelid allergies, children like to rub their eyes with their hands, which leads to redness and swelling of the eyelids; 5. Children with red and swollen eyelids also need to rule out kidney problems in children, but this is when puffiness in both eyes is the main cause.