There are two ways to treat gray nails, internal and external. Internal medications are usually itraconazole capsules and terbinafine hydrochloride tablets. Topical medications are usually Amorolfine Hydrochloride Cream, Miconazole Nitrate Cream, etc. Because internal medication will have certain side effects, if only a small amount of nail disease, only external application can be applied. Apply white vinegar soak cloth nail before applying the medicine to soften the nail, pay attention to the sick nail cut off. Normally, you should be careful not to have the diseased nail touch the skin of all parts of the body and prevent infection.