You need to eat less fish, shrimp, seafood, spicy food, and everything else is fine. Psoriasis on cats' skin is caused by a lack of nutrients and vitamins, and they need to be supplemented with nutrients. At this time, owners can feed their pets chicken, beef and canned food. After the owner discovers that his cat has ringworm, he can treat it with medicine every day. He also needs to clean the house to avoid the increase of ringworm.