It is not clinically recommended for patients to apply patchouli for the treatment of gray nails, as it does not have any particularly significant effect on the treatment of gray nails. Grey nails are a nail fungus caused by a fungal infection, so the first choice in treatment for grey nails is antifungal medication. The common clinical topical drugs like tincture of iodine, glacial acetic acid solution, ciclopirox, amorolfine, these drugs are still effective in treatment, you can also choose to take oral drugs to cooperate with the treatment, commonly used terbinafine and itraconazole are available, but the treatment of gray nails patients at home is not able to do, because gray nails before treatment is recommended that patients remove the diseased nail as much as possible, so as to ensure that This will ensure that the medication can effectively reach the lesion and work.