Condition	Characteristics
Prurigo nodularis	Thickened nodules on the arms and legs
Lichen simplex chronicus	Lichenified skin plaques, most often in the lower leg and groin areas
Psychogenic excoriation	Linear excoriations on the arms, legs, upper back, and scalp
Psychogenic parasitosis	Discrete scars and excoriations on the face, legs, and arms; fixated belief in parasite or insect infestation
Trichotillomania	Repeated hair pulling; excoriation uncommon