The most common cause of baby eye tearing are the following: 1, the most common is caused by infectious conjunctivitis, which may be caused by the child rubbing his eyes without washing his hands, resulting in bacteria entering the eye and causing inflammation, thus easily triggering infectious conjunctivitis, this disease will lead to eye tearing, the patient also accompanied by eye redness, increased eye discharge and other symptoms; 2, may be related to the baby’s congenital tear duct narrowing or Blockage, mostly seen in one eye tears, to go to the pediatric ophthalmology clinic before the baby four months, tear flushing can be cured; 3, may be caused by inverted eyelashes, eyelashes backwards will often stimulate the eye, thus causing tears; 4, baby tear secretion and cause, so as long as the baby cries or emotional excitement, the eyes will keep secreting tears.