Having excessive tears points to either your tear glands are overworking or the tears can’t drain away normally. Some of the reasons that cause your eyes to water include spending too much time in front of screens or bright lights, allergies and weather. It can also occur due to blocked tear ducts, a cut or scrape, and medical conditions such as chronic sinus infection, thyroid problems, Sjogren’s syndrome, Bell’s palsy, and rheumatoid arthritis. If you develop watery eyes suddenly, pay attention to the environmental factors or what it is you’re doing when that occurs. This may help explain the root cause. Further, consult your eye doctor if you have trouble seeing, if your eyes hurt, it feels like something is in your eye, or if your eyes are always watery.