“…In this review of the literature, stereotypic behavior at a younger age based on case reports may more typically indicate central and/or peripheral nerve disorders or genetic anomalies such as Lesch-Nyhan syndrome, central or peripheral tumors causing paralysis, or cognitive disorders such as autism or Rett syndrome. As seen in Table II, most self-mutilating behaviors that are observed in this age group result from nerve injury and most often present as biting of the hands and fingers 32,33,67,68 . Advanced imaging, referral to genetics or neurology departments, and careful history-taking for nerve injury or lack of sensation in the limb are indicated in the literature that discusses these presentations in patients of younger ages 31 .…”