Children with red and swollen lower eyelids, the following causes are common: 1. Conjunctivitis, red and swollen eyes, accompanied by increased secretions, tearing, red eyes and other symptoms, you can apply tobramycin eye drops, 1 drop each time, 4 times a day, 3-5 days will be significantly improved. 2. Mosquito bites. Unilateral eye redness and swelling is common, often accompanied by itching. 3, postural caused by. Because the eyes are loose hoof tissue, easy to make water storage after lying down leads to redness and swelling, mostly in the morning, after a day of activity will be significantly improved at night. 4, kidney disease, when there is acute nephritis or nephrotic syndrome can appear eye redness and swelling, you can go to the hospital to test urine routine.