Swollen eyes after waking up may be physiological factors, but also may be the manifestation of certain diseases, such as allergies, eye infections, kidney disease and other related. 1. Physiological factors: such as drinking too much water before going to bed, sleeping in the wrong position, etc., can cause the baby woke up with a swollen eye phenomenon. 2. Allergy: Parents should pay attention to check the existence of allergies, for example, children eat drugs, food before going to sleep, allergies may appear to cause eyelid swelling. 3. Eye infections: check whether the baby’s eyes are localized inflammation, such as acute conjunctivitis, due to bacterial infections, the baby’s eyes are swollen, accompanied by an increase in secretions, pain and other manifestations. 4. Kidney disease: renal system diseases, such as acute glomerulonephritis, or nephrotic syndrome, these diseases can also lead to the baby woke up with swollen eyes. If your baby’s eyes continue to be swollen after waking up, we recommend that you consult a doctor to find out the cause of the swelling and ask the doctor to take care of it.