When dogs are infected with skin diseases, they will have symptoms of hair loss and ringworm. They need to be sprayed with medicine regularly. After the skin disease is cured, the hair loss and ringworm areas will recover and new hair will grow. Skin diseases in dogs can be treated by spraying medicine or taking medicated baths. Usually, let the dog bask in the sun more, deworm regularly, keep the environment clean and hygienic, and dry the hair completely after bathing to avoid fungal infection.