Iodine does not kill the fungus, but only acts as a disinfectant. The prevention of fungal infections should pay attention to clean personal hygiene and avoid direct or indirect contact with fungal carriers. Fungal infections are clinically divided into superficial fungal infections and deep fungal infections, superficial fungal infections can be treated with topical drops or ointments, deep fungal infections can be treated with antifungal drugs such as econazole, fluconazole, etc. in addition to removing various triggering factors. In addition, some fungal infections can also produce toxins, such as aflatoxin produced by Aspergillus flavus is carcinogenic, so we should pay attention not to eat moldy, spoiled food, and to strengthen health promotion work to reduce the possibility of fungal infections.