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Lichen simplex chronicus (also known as "Neurodermatitis") is a skin disorder characterized by chronic itching and scratching.〔James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). Saunders. ISBN 0-7216-2921-0.〕 The constant scratching causes thick, leathery, brownish skin. == Causes == This is a skin disorder characterized by a self-perpetuating scratch-itch cycle: *It may begin with something that rubs, irritates, or scratches the skin, such as clothing. *This causes the person to rub or scratch the affected area. Constant scratching causes the skin to thicken. *The thickened skin itches, causing more scratching, causing more thickening. *Affected area may spread rapidly through the rest of the body. The skin may become leathery and brownish in the affected area. This disorder may be associated with atopic dermatitis (eczema) or psoriasis. It may also be associated with nervousness, anxiety, depression, and other psychological disorders. It is common in children, who chronically scratch insect bites and other areas. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lichen simplex chronicus」の詳細全文を読む スポンサード リンク
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