Gray nails are nail fungus, and nail fungus can be treated with amorolfine application. However, topical application alone is not effective, it is recommended to combine with oral antifungal drugs. Amorphophallus application is suitable for skin fungal diseases caused by skin fungi, such as tinea pedis, tinea cruris and tinea corporis, etc. Therefore, ringworm of the nails can be treated with Amorphophallus application. However, for severe fungal infections of the nails, topical application alone is less effective. Antifungal drugs such as terbinafine and itraconazole can be taken together under doctor’s supervision to help treat ringworm of the nails. A very small number of patients may experience adverse reactions such as erythema and itching after using Amorolfine Applicator. It should be noted that people who are allergic to this product as well as women during pregnancy should use it with caution. It is recommended that patients with onychomycosis go to the hospital to consult a doctor and use the medication under the doctor’s guidance to avoid abusing the drug.