If a child has one eye that is swollen, it is mainly due to the following conditions: 1. It is caused by the child having blepharitis. If children often rub their eyes with their hands, this can lead to inflammation of the child’s eye. When blepharitis occurs in children, the eyes become swollen and often have an increased amount of eye stool. This can be treated with anti-infection and antibiotic ointment. For example, oral cephalosporin and topical tobramycin drops can be given to children, and most children with blepharitis will be cured within a week. 2. If a child has acute nephritis it can also cause swollen eyes and abnormal white blood cell tests, such as increased red blood cell counts in children’s urine routine. For children with acute nephritis, it is important to give them symptomatic treatment such as diuresis in a timely manner.