What causes excess tearing in a cat's eye?

Excess tearing in a cat's eye can be caused by several factors, including Allergies, infections, or irritants in the environment, such as dust or smoke. Additionally, anatomical issues like blocked tear ducts or eyelid abnormalities may contribute to excessive tearing. Certain health conditions, such as conjunctivitis or feline herpesvirus, can also lead to increased tear production. If a cat exhibits persistent tearing, it's advisable to consult a veterinarian for a proper diagnosis and treatment.