Gray nails have a long course and are treated in many ways, but because patients with gray nails have individual differences, there is no fastest way to cure them. The treatment method chosen under the guidance of a doctor and fully integrated with the individual situation is usually the most suitable method for you. The common situations are as follows: 1. Superficial type: Fungal infection is usually confined to the surface of the nail and can be treated with topical medications such as amorolfine application, terbinafine ointment, sertaconazole ointment, or topical rubbing with ointments containing salicylic acid and benzoic acid; 2. Inferior nail type The nail bed and surrounding tissues are usually infected with fungus, because of the limited permeability of topical medications, it is difficult to treat the deep nail tissue and perineal tissue. If the nail is more severe or if it is combined with nail fungus, nail bed infection, etc., nail debridement should be performed in a timely manner as prescribed by the doctor, and laser therapy and photodynamic therapy can be used to assist in the treatment. If the patient has ringworm or chronic systemic diseases in other parts of the body, he or she needs to be treated actively along with the treatment of gray nails in order to cure them.