Eyelid redness and swelling in children may be related to allergy, tissue edema after crying, mosquito bites and other causes, which can be intervened by general treatment and topical medication. 1. Allergy: after allergy in children, symmetrical edema of both eyes may occur, which may be accompanied by itching, painful burning and other discomforts. Intervention can be made by using antihistamines such as loratadine and cetirizine. 2. Tissue edema after crying: Children are prone to eyelid edema after prolonged crying due to the loose tissue at the eyelids, which can be reduced by applying cold compresses. 3. Mosquito bites: mosquito bites are mostly unilateral eyelid swelling, can be intervened through appropriate cold compresses, topical glycerine lotion, but should pay attention to avoid drugs into the eyes. Eyelid redness and swelling for a long time without relief, or itching and pain symptoms are serious, it is recommended to go to the hospital in a timely manner; the above drugs need to be used under the guidance of clinicians.