Nail disorders due to trauma and other acquired conditions of the nail.

Physical and chemical trauma to nails may lead to damage, which presents as various conditions. At times the deformity will imitate systemic disorders or cutaneous diseases. Nail cosmetics and footwear are examples of exogenous factors that can cause such deformity if improperly used. Direct and self-inflicted trauma cause injuries as minor as temporary bands or as severe as permanent nail loss. Prompt treatment can prevent long-term cosmetic and functional damage.