Eyelid swelling in full-term infants can be seen in normal people, but it may also be caused by allergic dermatitis, blepharitis and other diseases, patients should consult a doctor in time to clarify the cause of treatment. 1. Physiological conditions: eye rubbing, poor rest, prolonged crying can cause eyelid swelling in full-term infants, such children should maintain adequate sleep, avoid crying, usually without special treatment. 2. Allergic dermatitis: Eyelid swelling in full-term infants may also be caused by allergens such as dust and pollen, as allergic dermatitis can lead to eyelid swelling, and children may also have localized rashes, itching and other discomforts. 3. Blepharitis: Bacterial infection caused by purulent inflammation of the eyelid glands known as blepharitis can also cause eyelid swelling in full-term infants, and children may also experience redness and pain in the eyelids. It is recommended that children with significant eyelid swelling and other symptoms should be seen promptly for evaluation of their condition and treatment as prescribed by the doctor.