How come my eyes gets watery?

See eye doctor: Try using artificial tears four times a day because many times the eyes water when they are dry as an overcompensation. If no relief, see eye doctor because the drain duct could be clogged.

Many causes...: But commonly, allergy, dryness or irritation. Other causes that are more rare include viral and chemical conjunctivitis. Artificial tears will help if the cause is dryness and are worth a try. The non preserved tears are less likely to cause irritation and would be my first choice. If this doesn't help, see your eye specialist. Prescription medications may be required.