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.6 Feb 2020
Is watery eyes serious?
Most cases of watery eyes aren't serious and will resolve without treatment. You should always call your eye doctor right away if you experience any changes in your vision. Vision changes can be a symptom of very serious eye problems that require prompt treatment.