Swollen eyes of 8-month-old babies may be associated with mosquito bites, or may be caused by eyelid trauma, eye allergies, acute dacryocystitis and other reasons. 1. Mosquito bites: 8-month-old baby’s tissues around the eyes are relatively thin and loose, if inadvertently bitten by mosquitoes, it may lead to edema of the tissues around the eyes, thus causing the eyes to swell. 2. Eyelid trauma: 8-month-old babies in grasping toys, due to the relatively poor control of the hands, if the toys inadvertently lead to the eyes, it may cause eye swelling. 3. Eye allergy: some babies belong to the allergic body, if the parents did not pay attention to let the baby away from allergens, stimulated by allergens, may cause eye allergy, it may cause eye swelling. 4. Acute dacryocystitis: usually due to bacterial infection of the eye, resulting in an acute inflammatory reaction in the lacrimal sac area, stimulated by inflammatory products, may cause the eyes to swell up, may also be accompanied by tears, difficulty in opening the eyes and other manifestations. 8-month-old baby’s eyes are swollen, may also be caused by other reasons, it is recommended to consult a doctor as soon as possible, after diagnosing the cause, follow the doctor’s instructions for treatment.