The most obvious symptom is that the cat’s eyes will shed tears unconsciously and the tear stains on the face are serious. There are many reasons for cats to shed tears. If the cat's nasolacrimal duct is blocked, it is usually caused by short tear ducts, mostly hereditary; inflammation of the cat's eyes and long eye hair can also cause the cat to shed tears; the cat's ears are not cleaned regularly, which breeds ear mites. , will also cause the cat to cry continuously. The owner also needs to prescribe the right medicine according to the specific cause.