You should go to see your doctor and he will check your eyes. If your watery eyes are caused by tear duct that leaks regually, your doctor will recommend you to have surgery. It just depends on what caused your watery eyes. So check with your doctor.
There are different reasons for watery eyes. To treat it, you should find out the real reason first. If it is caused by irritation or allergy, you can use some OTC eye drops. If it is caused by blocked tear ducts massaging, opening the tear ducts massaging would help to treat it.
Some eye disease will cause watery eyes, such as chronic conjunctivitis, dry eyes and Snow blindness. Some people have watery eyes because their tear ducts massaging is blocked. In this case, they need to open the tear ducts massaging. So it is better for you to see an doctor and find the real cause and take related treatment.