Nail appearance has been an important aspect of overall beauty for centuries. Numerous products that improve nail quality are sold daily as a form of adornment and self-expression or to hide nail dystrophy; however, some nail products and services may lead to complications such as allergic contact dermatitis, irritant dermatitis, paronychia, onycholysis, onychomycosis, and brittle nails. We review the potential benefits and adverse effects of various nail products and services.