Ringworm is a zoonotic fungal infectious skin disease that is more likely to occur in pets such as cats and dogs, and is transmitted to people by close contact between people and pets. So when a skin disease appears on a cat or dog, such as visible red spots, pimples, and hair loss be sure to isolate it and avoid close contact. At the same time, take your pet to the doctor and apply topical antifungal medication such as naftifine ketoconazole cream or terbinafine hydrochloride cream after the diagnosis is confirmed. After the rash subsides, treat the pet for a week to two weeks, and the ringworm will not be transmitted to people after it is cured. It is important to avoid close contact with your pet, to observe it regularly, and to treat it actively if it appears, so that it is not contagious to people.