Children’s eyes suddenly swollen may be related to bad habits, but also may be the emergence of conjunctivitis, nephritis and other diseases. 1. Bad habits, children watching electronic products for a long time, staying up late for a long time without enough sleep, mosquito bites may cause eye irritation, appearing children’s eyes suddenly swollen. 2. Conjunctivitis, some patients with conjunctivitis after inflammation to stimulate the conjunctival tissue, eyelid area congestion and swelling, there may be a child’s eyes suddenly swollen. 3. nephritis, clinical nephritis, inflammation stimulation leads to glomerular filtration function decreased, the body water can not be metabolized in a timely manner, stagnation may cause body edema, the child’s eyes suddenly swollen situation. The child’s eyes suddenly swollen may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.