Gray nails, i.e. nail fungus, its oral and topical medications have good efficacy, relatively speaking, oral medication is better faster, but there is no such thing as which method is better. You need to go to the hospital in time and use the medication under the doctor’s guidance. Commonly used oral medications for onychomycosis include terbinafine hydrochloride tablets, itraconazole capsules, fluconazole tablets and so on. The course of treatment for onychomycosis with oral medication is usually about 8~12 weeks, with a slightly shorter course of treatment for onychomycosis of the hands and a longer course of treatment for onychomycosis of the feet. Topical medications for onychomycosis include glacial acetic acid, povidone-iodine application and amorolfine application. Nail fungus is often characterized by thickening of the fingernails/toenails, and the nails should be thinned with a file before using the medication. Topical medications are usually used to treat onychomycosis on the hands for 6 months or more, and onychomycosis on the toenails for a little longer. If you have onychomycosis, it is recommended that you go to the hospital in time for treatment, and medication should be used as prescribed by your doctor.