Children’s eyes are swollen but not painful and itchy, may be too much water before going to bed, poor sleep, nephritis and other reasons. 1. Drinking too much water before going to bed: If a child drinks too much water before going to bed, the body does not discharge water in a timely manner, resulting in the next day woke up with swollen eyes, but generally not accompanied by pain, itching and other discomforts, generally can be relieved after resting, do not need special treatment. 2. Poor sleep: if children do not get enough sleep, often stay up late to play cell phones, TV and other electronic products, the morning after waking up easily swollen eyes, but not accompanied by pain, itching symptoms. 3. Nephritis: nephritis and other diseases because of abnormal kidney function, the body can appear water and sodium retention, the body’s water can not be discharged to the outside of the body, but in the body to accumulate, the child is prone to edema, edema is prone to appear in the loose eyelid area, which led to the child’s eyes swollen. It is recommended that children with swollen eyes and other discomforts consult a doctor for evaluation of their condition and treatment as directed by the doctor.