A nail disorder can be treated using a device, such as a pad or covering, that delivers a drug for treating the disorder. The pad can be secured to skin over at least a portion of the nail matrix and extend over less than one-third of the nail plate. When applied, the drug carried by the pad can penetrate into the skin until reaching the nail matrix, where the nail plate is formed. The drug can treat nail disorders such as onychomycosis or psoriasis.
