Last summer my eyes watered constantly for about 4 month. I went through eye tests, doctors appointments and hospital trips to stop it since it seemed so abnormal to happen since I am only 21. Irritation, blocked tear ducts and allergies were ruled out. Dry eyes were sugested but at 21? why? Hayfever was a first though but pollen count is low just now and it happens day and night. Numerous drops were perscribed but did not work, eventually they stopped on their own! This past week its started again but only 1 eye so far but dont know best thing to do since nothing worked last time?