Excessive tears in dogs may be caused by the dog getting angry, eye inflammation, eye disease, foreign body irritation, inverted eyelashes, ear and nose problems. It is best to take the dog to the hospital for examination to avoid aggravation of the condition. You need to pay attention to your dog's diet and don't feed your dog too salty food, otherwise your dog will easily get angry and produce more tears. Pay attention to keeping your dog's eyes clean, and clean up any foreign matter in time to avoid breeding bacteria.