Tinea corporis is a form of ringworm that manifests itself clinically as annular erythema, which is brightly colored and itchy, and may cause autoinfection with multiple lesions after partial scratching. The treatment is based on topical medications, such as naftifine ketoconazole cream, bifenoconazole cream, and compound ketoconazole ointment, which are applied twice a day and are recommended to be used continuously for more than a month. Because catarrh is more serious than general ringworm, the course of treatment must be sufficient. In addition to that, make sure to iron and expose the clothes to the sun.