Causes for yellowing of cat’s mouth:

1. It may be that the food the cat eats is too oily, causing the sides of the cat’s mouth to turn yellow.

2. It may also be that the hair around the cat’s mouth turns yellow due to genetic influence, and this situation cannot be changed.

3. It is also possible that the cat’s mouth is yellow due to a lack of certain trace elements.

4. It is also possible that the cat does not clean the area around its mouth in time after eating, which will cause the cat's skin to turn yellow.

Solutions to a cat’s yellow mouth:

1. If it is caused by diet, feed less oily and salty food to the cat, keep the cat’s diet light, and Pay attention to nutritional balance.

2. If it is caused by a lack of trace elements, the cat can be solved by supplementing trace elements in appropriate amounts.

3. If it is caused by dirty mouth, clean the cat’s mouth with warm water and wet paper towels in time after each meal.