Swollen eyes in babies may be caused by physiological reasons, eye diseases and internal diseases. 1. Physiological reasons: if the baby’s sleep quality is poor, drink too much water before bedtime, and sleep with the head in a lower position, all may lead to the baby after sleeping swollen eyes. 2. Eye diseases: If the baby has blepharocysts, blepharitis, allergic conjunctivitis and other eye diseases, it may also lead to swollen eyes when the baby sleeps, but also foreign body sensation and other discomforts of the eyes. 3. Internal diseases: If the baby has diabetes, anemia, kidney disease and other internal diseases, may also appear baby sleep swollen eyes and other discomforts. It is recommended that patients with obvious eye swelling consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.