Lichenified means the skin has become thickened and leathery. This often results from continuous rubbing or scratching the skin.
Chronic irritation due to conditions such as eczema can cause lichenified skin.
Habif TM. Principles of diagnosis and anatomy. In: Habif TP, ed. . 5th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 1.
Armstrong CA. Examination of the skin and approach to diagnosing skin diseases. In: Goldman L, Schafer AI, eds. . 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 444.