- Thick, leathery skin, usually the result of constant scratching and rubbing. With prolonged rubbing or scratching, the outer layer of the skin (the epidermis) becomes hypertrophied (overgrown) and this results in thickening of the skin and exaggeration of the normal skin markings, giving the skin a leathery bark-like appearance. Lichenification is a common consequence of atopic dermatitis (eczema) and other pruritic (itchy) disorders. It may also arise on seemingly normal skin.
* * *Leathery induration and thickening of the skin with hyperkeratosis, caused by scratching, as in atopic or chronic contact dermatitis. [lichen + L. facio, to make]
* * *li·chen·i·fi·ca·tion lī-.ken-ə-fə-'kā-shən, .lī-kən- n the process by which skin becomes hardened and leathery or lichenoid usu. as a result of chronic irritation also a patch of skin so modified
* * *n.thickening of the epidermis of the skin with exaggeration of the normal creases. The cause is abnormal scratching or rubbing of the skin.
* * *li·chen·i·fi·ca·tion (li-ken″ĭ-fĭ-kaґshən) hypertrophy of the epidermis, with thickening and toughening of the skin to give it a leathery appearance, and exaggeration of its normal markings; this is caused by prolonged rubbing or scratching and may be on seemingly normal skin or on skin that has a pruritic disorder.
Lichenification associated with atopic dermatitis.
Medical dictionary. 2011.