Gray fingernails, or onychomycosis, can be treated with oral antifungal medication, physical therapy or surgery. 1. Drug treatment: ringworm is a fungal infection of the nail caused by nail morphology and structural changes, you can take oral antifungal drugs under the guidance of a doctor, such as terbinafine, itraconazole, etc., and need to be used in sufficient quantities and full course of treatment. For superficial nail fungal infections, topical drugs such as amorolfine can be used. 2. Physical therapy: when the drug is not effective, it can be combined with laser therapy and photodynamic therapy, which can inhibit the fungus and promote the absorption of drugs. 3. Surgical treatment: If the gray nail condition is more serious and obvious nail damage has occurred, surgical treatment, such as nail extraction, may be needed. After surgery, medication is still needed to prevent recurrence. Gray nails need to maintain good habits, regular medical review, but also need to do a good job of daily disinfection, the specific use of drugs need to follow the doctor’s instructions.