Small children sleep up eye swelling may be due to sleeping posture is not correct, kidney disease, mosquito bites. 1. Incorrect sleeping posture: sleep on your stomach or pillow too low, head low foot high, will cause venous blood flow in the eye is blocked, eyelid swelling, sitting and standing, eye swelling can disappear. 2. Kidney disease: kidney diseases such as acute glomerulonephritis, excessive water can not be discharged from the body, causing sodium retention, can cause symmetrical edema of both eyes, bilateral lower limb depression edema. 3. Mosquito bites: mosquito bites around the eye, the inflammatory response can cause redness and pain around the eye, mostly occurring unilaterally. Children sleep up eye swelling may also have allergic conjunctivitis, eyelid dermatitis and other causes, 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.