Gray nails can be cured. For the treatment of gray nails, it is recommended to use topical medication, first of all, you should use a nail file to trim off the diseased nails, and then apply topical ointment, the general medication are amorphophallus hydrochloride cream, compound povidone iodine cream, miconazole nitrate cream, etc. This method is usually used when the diseased nails are fewer in number; if more than half of nails suffer from gray nails, then you need to take anti-fungal medication orally, for example, take terbinafine hydrochloride tablets, itraconazole capsule, etc. If more than half of the nails are affected by gray nails, oral antifungal medication is also needed, such as taking terbinafine hydrochloride tablets and itraconazole capsules. You can also use some traditional Chinese medicine ingredients, blood circulation and anti-inflammatory soaking drugs.