Grey nails are a common fungal disease caused by a fungal infection of the nail plate and the underlying nail tissue. In clinical practice, regular antifungal treatment can be given to children who have gray nails. However, children need to be more careful about the medications they are given. For children, topical antifungal treatment should be applied topically as much as possible. Amorolfine is commonly used, as well as antifungal drugs and urea encapsulation to combine treatment, such as bifenazole cream and urea ointment to combine encapsulation. But when the patient’s condition is more serious, oral antifungal drugs, such as like itraconazole, terbinafine, fluconazole, etc., can also be chosen. But it depends on the age of the child as well as the kilogram weight to combine the risk as well as the benefit obtained before deciding.