Thick nails, also known as thickening of the fingernails, are mainly seen in onychomycosis and can be completely eradicated by giving antifungal medications. Nail due to infection of ringworm will cause damage to the nail plate, at the same time will lead to the degeneration of keratin protein and thus appear nail thickening, nail white spots, nail granular and warped shell, etc. In terms of treatment, the main is to choose some broad-spectrum and highly effective antifungal drug treatment. 1. Topical medication: the medication can penetrate the nail plate after absorption through the skin and diffuse in it, thus eradicating the fungus in the nail plate and under the nail plate, commonly used medications include amorphophallus powder, miconazole nitrate cream and so on. 2. Oral drugs: through oral absorption of the way to promote the drug directly to the lesion site, so as to achieve the effect of antifungal, commonly used drugs are itraconazole capsules, fluconazole dispersible tablets and so on. Because of the adverse effects of drug treatment, the specific use of drugs must follow the doctor’s instructions. It is recommended that patients go to the hospital in a timely manner, under the guidance of the doctor to standardize the treatment.