1. Some cats have long eyelashes that easily fall into their eyes, constantly stimulating them to produce tears and causing severe tear stains. In this case, you should seek veterinary help as soon as possible to trim the cat's excessively long eyelashes.
2. Cats that eat a lot of snacks, ingest too much salt, or suffer from internal heat may also develop noticeable tear stains.
3. If a cat is infected with feline rhinotracheitis or feline panleukopenia virus, it may develop conjunctivitis, which can also cause increased eye discharge and tear stains. If you are unsure of the cause of your cat's excessive tear stains, it is best to take your cat to a veterinary clinic for examination as soon as possible.
