Why is only my right eye watering?

Our eyes work like little machines that make tears to keep them clean and comfortable. Normally, tears are made and then drain through tiny channels called tear ducts. When only one eye waters, it might mean that the tear duct in that eye is blocked or not working well.

This blockage results in the tears having nowhere to go and thus overflowing onto your cheek. Sometimes, that eye might water because of irritation or a small injury, such as dust or an allergy that makes it extra sensitive.

In rare cases, there could be a growth or abnormal change in the tear duct area that causes extra watering. While these problems are usually not serious, if you notice that your one eye keeps watering for a long time, it's a good idea to check your symptoms with our free AI symptom checker or see an eye doctor. An eye doctor can look closely at that eye to see what might be causing the problem and suggest treatments to help your eye feel better.