A positive fungal microscopic test is required to confirm the diagnosis of nail fungus before treatment. However, since the fungus is hidden deeper in the nail area and there are fewer mycelium in the superficial area, many times the microscopic examination cannot detect the fungus, so a fungal culture test is needed. At this time, you can take oral terbinafine hydrochloride tablets or oral itraconazole capsules, 2 times/day, 2 capsules/time, after a week of oral intake, take a break for three weeks, and then proceed to the next step of treatment. Usually the nail area needs to be applied for about 3-6 courses of treatment, and topical medication on Amorolfine Hydrochloride application is applied for treatment.