The eye is always watery.
Tears run down the face even without crying.
During crying, the nostril on the blocked side remains dry. Symptoms begin before a child is 1 month old. Your child probably has a blocked tear duct on that side. This means that the channel that normally carries tears from the eye to the nose is blocked. Although the obstruction is present at birth, the delay in onset of symptoms can be explained by the occasional delay in tear production until the age of 3 or 4 weeks in some babies.