Gray nail refers to onychomycosis, clinical often take medication, surgical treatment, physical therapy and other methods to remove, specific as follows: 1. medication: you can use topical amorolfine application, but the efficacy is limited, mainly oral antifungal drugs for treatment, such as terbinafine hydrochloride tablets, itraconazole capsules, fluconazole capsules and so on. 2. Surgical treatment: mainly take nail extraction or nail removal, used in the presence of distal nail plate involvement or embedded nails thick, in addition to the disease of the nail before the need to use drugs to soften the nail plate, followed by extraction. 3. Physical therapy: such as laser therapy, its high energy, high targeting can have a certain inhibitory effect on the local pathogenic bacteria of the diseased nail, can also be taken photodynamic therapy, eliminating pathogenic microorganisms to achieve the therapeutic purpose. It is recommended that patients consult a doctor in time, under the guidance of the doctor, combined with personal circumstances, choose the appropriate treatment method.