Long fur around a cat's eyes can cause tear stains; trimming it appropriately can help. Massaging your cat's eyes daily can help open the tear ducts and reduce tear stains. Feeding your cat a low-sodium diet can also help reduce tear stains. Additionally, using a special tear stain remover for cats can also remove tear stains. 
How to remove cat tear stains
Cats have sensitive eyes, and the thick, long fur around their eyes can easily irritate them, causing them to tear up and eventually develop tear stains. To address this, owners need to trim the fur around their cat's eyes, including any fur that is causing tear stains.
Applying a special tear stain remover to your cat daily can also help reduce tear stains. Before each application, the owner can gently wipe the tear stains with warm water several times to keep the area around the eyes clean.
Some cats are naturally prone to whimpering and are more likely to develop tear stains, such as Exotic Shorthairs. In this case, owners can massage their cat's eyes daily to help clear the tear ducts, promote tear drainage, and thus alleviate tear stains.
Eating too much salty food can lead to excessive salt levels in a cat's body, causing tear stains. In this case, immediately adjust their diet, avoiding salty human food and providing a bland diet. Offering plenty of cool boiled water is key to removing tear stains.
