Childhood ADHD, also known as Attention Deficit Hyperactivity Disorder (ADHD), refers to a group of syndromes that occur in childhood and are characterized by marked and persistent inability to concentrate, hyperactivity, capriciousness, impulsivity, and so on, compared to children of the same age. It is currently recognized as a syndrome caused by a synergy of biological and psychosocial factors. Early detection and intervention can improve the prognosis. ADHD in children starts before the age of 7, with symptoms present for more than 6 months, and is characterized by an age-inappropriate tendency to be easily distracted in situations that require focused attention, lack of persistence, and a tendency to shift from one activity to another. There is an increase in actions that are inappropriate for their age or the situation in which they are placed, and are more pronounced in situations that require relative quiet, such as an inability to sit still in class, making small movements, shouting, and enjoying pranks to harass others. Emotional instability, easily provoked impulsive, in dangerous occasions, reckless behavior, interfere with the activities of others. There is also often poor academic performance, but normal intelligence.