Gray fingernails medically known as onychomycosis, is due to fungal infections, can be treated with medication such as oral terbinafine, fluconazole, etc., medication is ineffective, you can also do nail plucking or nail removal surgery treatment. 1. Medication: If the effect of ointment application is not very obvious, patients can choose oral fungal drug treatment, commonly used drugs such as terbinafine, fluconazole, itraconazole, etc., there may be nausea and vomiting and other gastrointestinal adverse reactions when taking the drug, and allergic to the components of the drug, such as terbinafine and other drugs are prohibited in patients with the drug. 2. Surgery: If the patient’s medication is ineffective, or the condition of the nail is complicated, you can choose the surgical method to remove the diseased nail, but this method is more damaging. If diagnosed with gray nails, it is recommended that patients undergo regular treatment as soon as possible to reduce the adverse effects of the disease. Should be in the doctor’s guidance under the use of drugs, avoid unauthorized use of drugs, so as to avoid bringing adverse consequences.