Well, in my opinion, it may relate to the dry eyes. Generally speaking, your watery eyes are often a sign of dryness. As we know that tears are for lubrication and for keeping your eyes clean. So when your tear glands don't work in a wrong order, it may develop dry eye syndrome. In other words, if your eyes become dry and uncomfortable, the tear glands react by producing large amounts of tears. Anyway, it will be kind of dangerous for you to have this kind of symptom. So you should go and see a doctor. So that you can make sure what happen to your eyes. Also, infection and allergies are also the causes of your symptom.