The treatment of grey nail infection should be carried out in a full course and effective, and oral antifungal medication such as terbinafine hydrochloride tablets or itraconazole capsules must be taken. Itraconazole capsules are taken orally for one week after application and stopped for three weeks as a course of treatment, which usually takes three months for fingernails and six months for pedicures, and in terms of dosage should be taken orally twice a day, two capsules at a time. The above oral medication should be accompanied by topical medication. Amorolfine hydrochloride rub can be applied twice a day, followed by topical application of miconazole nitrate ointment or naftifine ketoconazole ointment to strengthen the antifungal treatment.