Lichen simplex chronicus (neurodermatitis)
Lichen simplex chronicus or nodular prurigo refers to a cutaneous response to rubbing or scratching normal skin.
More common in Asian, African and Oriental patients and is associated with atopic tendency.
Following intense itching and recurrent scratching of a patch of skin, lichen simplex chronicus presents as a single plaque often on the lower leg, neck or the perineum. Nodular prurigo presents as multiple itchy nodules, which are more diffusely distributed.
Lesions are often refractory to treatment although topical steroids, tar bandages and phototherapy are tried.