Stereotypic movement disorder is a disorder of childhood involving repetitive, nonfunctional motor behavior that markedly interferes with normal activities or results in bodily injury, and persists for four weeks or longer. Some of the behaviors include:

  1. hand shaking
  2. hand waving
  3. body rocking
  4. head banging
  5. mouthing of objects
  6. self-biting
  7. picking at skin or bodily orifices
  8. hitting own body