What happens when your eyes tear too much?
Lots of medical conditions can cause watery eyes, like Bell’s palsy, Sjogren’s syndrome, chronic sinus infections, thyroid problems, and rheumatoid arthritis. So can medical treatments like chemotherapy or radiation. If your eyes tear up often and you don’t know why, see your doctor.
Why do eyes tear when not crying?

We are constantly making tears, this normal tear production is called basal tearing. It is normal to have the occasional watery eye from basal tears, in certain situations the eye will also make extra tears in response to certain stimuli. These tears are called; reflex tears or emotional tears.
What happens when your eyes shed too many tears?
When eyes shed too many tears for seemingly no particular reason, it is usually the result of watery eyes disease. This bothersome condition can not only be embarrassing or annoying, but it can also interact with daily activities, like driving and reading, and in the worst case scenario, will eventually lead to loss of vision.
Why do my eyes get watery when I Cry?
Producing tears is a normal bodily function. Crying is an emotional response to something happy or sad, but sometimes tears are triggered for neither of these reasons. When eyes shed too many tears for seemingly no particular reason, it is usually the result of watery eyes disease.

Are there any eye problems that are serious?
Eyes aren’t exempt from the wear and tear of aging. Some of the age-related changes in the eyes are annoying but not serious — for example, it can become difficult to focus on near objects, and eyelashes may thin out a bit. But other changes can be serious eye problems that threaten vision.
Why do my eyes sting when I Cry?
There are a few reasons your eyes might sting when you cry that signal a typical bodily response. Things like soap, fragrances, or dust may cause your eye’s lacrimal glands (those glands just below the tail of your brow) to produce reflex tears to try to fight off these invaders.