Gray nails are also known as onychomycosis, and the treatments for onychomycosis on feet include medication, surgery and physical therapy. 1. Drug treatment: you can choose topical antifungal drugs for treatment, commonly used drugs are amorolfine application, cyclopiazepoxide cream and so on. Oral antifungal drugs can also be chosen, commonly used drugs are terbinafine, itraconazole, fluconazole and so on. 2. Surgical treatment: some patients with stubborn onychomycosis have secondary infection after nail trauma, or have ingrown nails, or have obvious nail deformities, so the sick nails can be removed and cleaned up with the help of surgical means. 3. Physical therapy: such as laser therapy, photodynamic therapy, ionic introduction therapy, can be used as auxiliary treatment or alternative treatment options. It is recommended that patients with onychomycosis go to the hospital in time, under the guidance of the doctor to standardize the treatment, the use of drugs need to follow the doctor’s instructions, do not blindly self-medication, this disease needs to adhere to the use of drugs.