Primary symptoms are the symptoms of the syndrome itself: distractibility, impulsivity, restlessness, and so forth. The secondary symptoms, and the ones that are most difficult to treat, are the symptoms that develop in the wake of the primary syndrome not being recognized: low self-esteem, depression, boredom and frustration with school, fear of learning new things, impaired peer relations, sometimes drug or alcohol abuse, stealing, or even violent behavior due to mounting frustration.
