Generally speaking, parasites can cause redness and edema around the cheeks and eyes of fish. The treatment method can choose to use insecticidal drugs, which can be purchased in pet shops or veterinarians, and the usage can be used according to the instructions. At the same time, some daily preventive measures can effectively avoid this situation, such as changing water frequently and cleaning fish tanks. If the situation is serious, it may be necessary to transfer the fish to a temporary aquarium for various treatments and observations.
In a word, the redness of goldfish cheeks may be caused by many reasons, which need comprehensive consideration and treatment from many aspects. At the same time, it is necessary to strengthen daily preventive measures to ensure the clean water quality of fish tanks and the health of fish.