Gray nails are not contagious through quilts; they are caused by a fungal infection of the nail plate. When the nail is broken, or nail trauma is most likely to be infected. Mostly due to their own ringworm or tinea pedis, at the same time in the nail trauma easily infected gray nail, normal life contact or bedding, clothing rarely infected, do not need to be overly nervous. After the infection of gray nails, you need to take oral antifungal drugs for treatment, and the penetration of external drugs is poor, the therapeutic effect is poor, and the use of medication for a long time. It is recommended to take oral itraconazole, terbinafine or fluconazole, and at the same time can be combined with the external use of better permeability of amorolfine applicator for treatment.