Swollen eyelids of babies can be considered to be caused by eye skin allergies, mosquito bites, kidney disease, eye lesions, etc. Some babies with swollen eyelids can also be considered to be sleeping too much, drinking too much water, which lasts for about 2 days or so can be recovered without special treatment. 1. Eye skin allergy: eating allergic food or eyelid area contact with pollen dust, etc., easily lead to skin allergies, can be under the guidance of the doctor for anti-allergy treatment. 2. Mosquito bites: the eyelid area happens to be bitten by mosquitoes, there will be swelling, you can apply anti-mosquito bites under the guidance of the doctor. 3. Kidney disease: Kidney metabolic abnormalities, such as glomerulonephritis, nephrotic syndrome, etc., can cause eye edema, and need to be treated for kidney disease first. 4. Eye diseases: common conjunctivitis, keratitis, etc., there will be eye congestion and increased secretion, can be treated with tobramycin eye drops. There are more causes of swollen eyelids in babies, so there are more treatment methods, it is recommended to take your baby to a professional pediatric or ophthalmology hospital for treatment.