There is no best way to treat gray nails, which is nail fungus disease, and you need to use medication under doctor’s guidance. The treatment methods involved are medication and daily care. 1. Drug treatment: drug treatment is based on antifungal, can be used externally, such as amorphophallus powder, or oral itraconazole capsules, terbinafine hydrochloride tablets, and so on. If necessary, both topical and oral medications can be used at the same time. 2. Daily care: Many patients with nail fungal disease are caused by fungal infections on the hands and feet spreading to the underside of the nail plate, nail fungal disease can be treated at the same time for fungal infections on the hands and feet to avoid recurrence. Usually should pay attention to avoid the use of other people’s slippers, nail clippers and other items, it is best not to wear too tight shoes or high heels, to avoid trauma.