Secretion volume of your tear is too much as you are stimulated by mental or the reflex stimulation of foreign bodies. Or there is failure of your tears of the excretory system. You can clean the boogers with a cotton swab dipped in warm boiling water, and then smear your eyes with erythromycin eye ointment three times a day. As long as you have the time, you can gently massage the cross section from the eye to nose, that is the site of the nasolacrimal duct, the effect should be good ten minutes every time.
As we know that tears are necessary to lubricate the eyes. If the tear ducts are not working properly or too much tearing takes place, tears accumulate in the eye, then it will lead to watery eyes. If the eye is dry, too much tearing takes place. Usually watery eyes are a combination of excessive tears and malfunctioning tear ducts. So maybe you should pay more attention to your eyes, and in my opinion, you should go and see a doctor first, and the doctor will give you some good suggestions. Or it will lead to a big problem.
The production of tears is also known as lacrimation. It is normal and tearing can lubricate and wash the eyes, thus to keep your eye health. But there are some causes that may lead excess lacrimation. The most common reasons is Bacterial conjuctivitis and allergies. But if you got Bacterial conjuctivitis and allergy, it also company with the symptoms of red eye, eye pain and blurred vision. If so, you need to get eye checked and ask help from eye doctor.
Sometimes when we yawn before the sleeping, there may be the water from our eyes. It is normal phenomenon. But your situation is a little different. As we know, the tears come out of the eyes because of the excretion of tear gland. If the excreted system gets trouble, the water may come out from our eyes with no control. Or else, the infection of bacterium during the days may also make this happen. Whatever causes this, you'd better go to see the doctor and have a check.