There are several reasons for the swelling of the lower eyelid of the baby: 1, it is caused by conjunctivitis, the conjunctiva on both sides of the eye is congested with eye boogers and tears. It can be a bacterial infection or a viral infection.2, is the cause of allergies, eat irritating foods, medications, food, contact allergies, can form swelling, pain, often accompanied by itching.3, summer mosquito bites are also formed swelling.4, eyelid wheals because of follicle clogging around the eyes, secretions have no way to discharge, will also be swollen, mostly accompanied by pain. Lower eyelid swelling is a short period of time, the possibility of allergy is relatively large. If the swelling persists, it is recommended to take your baby to a regular hospital for examination to diagnose the real cause of the swollen eyelids and then give treatment. At the same time, watch the baby’s hands do not touch, rub the eyes, pay attention to the baby’s diet should be light, to drink more warm water.