Hi Dear your having watering eye, what is commonly called as epiphoria is usually due to two condition,one is conjunctivitis
and other is blocked lacrimal duct.in conjunctivitis the eye is red and pain full,where as in blocked lacrimal gland
thee are only tears.and these are more, once there is rhinitis(common cold
)running of nose doesn't mean that you don't have blocked nose,nose running could be due to rhinitis and patent lacrimal duct of left eye.consult ophthalmologist
(eye specialist) ,he/she will do a small procedure on you called syringing and probing,to look for your blocked lacrimal duct,and even small block will be get cured by this procedure..if the duct is blocked,surgical procedure depending on age is done,which you have not mentioned in question.