There is no six-day no cure for gray nails by any stretch of the imagination. Formal treatment requires oral medication for 3-4 months, and the appearance can be completely normal for 6-8 months after taking the medication. Gray nails are a nail fungus caused by a fungal infection that invades the nail plate. Because the nail grows slowly, about 2mm per month, and the fungus is exceptionally strong, it is difficult to be completely killed in the general environment, unless boiled in a high-pressure steamer. And the sterilization condition of the fungus is beyond the body’s ability to withstand. Therefore, the prevailing method of treating gray nails is to cure them by continuous or shock oral administration of antifungal medication to allow the tissue to reach a certain blood concentration of antifungal medication so that the newly grown toenails are not contaminated. This process of oral medication needs to last 3-4 months with either shock therapy (intermittent doses, itraconazole capsules, taken for one week each month for 3-4 months) or sequential therapy (continuous doses, terbinafine tablets, for 6-8 weeks). Liver function needs to be tested before and during treatment to avoid drug-induced liver damage (low incidence, about 1% of the population). Also trim and polish the nails more often, and apply topically with compound benzoic acid solution, amorolfine rub, and tincture of iodine. The formation of gray nails is not overnight and the treatment is relatively complicated, but the cure rate is high, over 95%, if you go according to the standard treatment course, you can choose according to your own situation.