Symptoms include limited attention and hyperactivity.
People may experience:
Behavioral: aggression, excitability, fidgeting, hyperactivity, impulsivity, irritability, lack of restraint, or persistent repetition of words or actions
Cognitive: absent-mindedness, difficulty focusing, forgetfulness, problem paying attention, or short attention span
Mood: anger, anxiety, boredom, excitement, or mood swings
Also common: depression or learning disability