There are many parents who complain that their children are too disobedient, don’t pay attention in class, and get into trouble everywhere. So much so that parents worry if their son has ADHD. In fact, there is a fundamental difference between a child’s mischievousness and ADHD. First, in terms of attention: children with ADHD can not concentrate no matter when and where they are, while naughty children are not focused because they are not interested in learning, if they really encounter their favorite games or cartoons, he is really focused on it; secondly, in terms of self-control: do not look at the urchin usually at home to make fun, really bring him to a more serious and unfamiliar environment such as The child with ADHD, however, will behave erratically even in such serious situations. Third, in terms of willpower and behavior, careful parents often see that their children, although naughty, often have a certain plan for their games and can insist on completing them. In contrast, the actions of children with ADHD are purposeless, with no end in sight, and the actions of children with ADHD are very clumsy, which is very different from the general intelligence and dexterity of children. In fact, the prevalence of ADHD in children is generally only 3-5%, and the majority of children are active only by nature. Parents and teachers should not give the definition of “hyperactivity” to a naughty child before the child is diagnosed by a psychiatrist, in order to avoid trauma to the child’s psyche. The diagnosis of ADHD requires a specialist to conduct relevant examinations and tests at a specialist hospital. How is the diagnosis made and how is it treated? Mild symptoms that do not affect the child’s life or learning can generally be treated with psychotherapy and family and behavioral interventions. A relaxed, harmonious and caring family atmosphere has a very important impact on the relief of the child’s symptoms, and parents should not be overly concerned about the child’s every move and can be “indifferent” to some behaviors. Severe symptoms need to be treated with medication under the guidance of a physician. Most children with ADHD will disappear as adults, but some may develop other psychiatric disorders. In addition, children with ADHD have symptoms that severely affect their interactions with normal children, creating barriers to their physical and mental development and social interaction.