Skin disease attributed to neurological or psychological causes; an instance of this; especially localized thickening of the skin due to rubbing or scratching of a persistent itch (also called lichen simplex chronicus).
Late 19th century. From neuro- + dermatitis after French névrodermite (Brocq & Jacquet 1891, in Ann. de Dermatol. et de Syphiligraphie 2 98; also 1855 in Littré-Robin.