What kinds of behavior problems do people with SMS have?
SMS individuals experience hyperactivity, self-injury (including: head banging; hand biting; picking at skin, sores and nails; pulling off finger- and toenails; inserting foreign objects into ears, nose, or other body orifices), explosive outbursts, prolonged tantrums, destructive and aggressive behavior, excitability and arm hugging / hand squeezing when excited.