The black scabs under the cat's eyes are the cat's eye feces. The cat's eye secretions are not cleaned in time and are oxidized by the air, so black scabs form on the edge of the lower eyelids. The owner can use wet wipes to clean the cat. If a cat has a sudden increase in eye secretions, the breeder can first check whether there are ear mites in the cat's ear canal. If there is nasal discharge in the cat's nose, the breeder should carefully observe whether it is a sign of nasal branch.