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. The longer the diagnosis of ADD is delayed, the greater the secondary problems may become.
