The yellowing of a cat's mouth may be due to a lack of timely cleaning around the mouth during daily feeding, which can lead to this condition over time. Therefore, prompt treatment is crucial. One reason for a cat's mouth turning yellow is that the area around its mouth isn't cleaned promptly after eating, causing the skin to turn yellow.

How to fix a cat's yellow mouth
If your cat's mouth turns yellow, you need to deal with it promptly to prevent irreversible damage. You can try cleaning it with alcohol or green tea. Also, reduce the amount of oily food you feed your cat and feed it regular cat food. When choosing cat food, try to avoid oily foods and ensure a comprehensive supply of nutrients.