It is often said that it is in a child’s nature to be active. Almost all children have had moments of inattention and out-of-control behavior, however, some children’s out-of-control behavior is no accident. Children with ADHD are some of these children, whose behavioral problems are more serious, seriously affecting their normal learning and daily life. The incidence of psychological problems among children in China ranges from 10.2% to 14.5%, with ADHD being the most common. What is ADHD? Childhood ADHD, also known as Attention Deficit Hyperactivity Disorder, is a group of syndromes characterized by age-inappropriate difficulty in paying attention, short attention span, hyperactivity, and emotional and behavioral impulsivity. ADHD tends to start around the age of 3 and is most prominent at the age of 9. Generally diagnosed at the age of 7~10 years, the prevalence of this disease in school-age children is reported at home and abroad is 3%-5%; boys are significantly more than girls, the ratio of men to women in outpatient clinics is 4-9:1. ADHD is the most common psychological problems in school age, so parents should pay attention to it, we must understand the child’s feelings in time, correctly understand the child’s behavior, timely guidance, perfect Family education, rather than simply rough treatment of children. So, what are the dangers of ADHD in children? The harm of ADHD is multifaceted. 1, the harm to the children themselves: for children with ADHD, due to the child’s lack of attention in class, it is difficult to pay attention to the lecture, often careless, homework procrastination, a long time to lead to poor performance. The point is, ADHD children in the classroom is difficult to comply with classroom discipline, like to interrupt, the teacher is difficult to manage the child, for this reason, these children are sometimes forced to drop out of school or change to other schools. ADHD patients are more likely to suffer from mood disorders and anxiety disorders in adulthood, seriously affecting their career choices and life, so parents must be vigilant. 2, the harm of the family: children suffering from ADHD, sometimes with classmates quarrel, resulting in the child’s interpersonal relations deterioration, the grades are getting worse and worse. At this time, many parents will choose to scold the child, or punishment. This affects the child’s mood and may lead to aggravation of the child’s condition, as well as family disharmony. What are the symptoms of ADHD in children? ADHD in children includes three core symptoms. Difficulty concentrating; excessive activity; emotional instability and impulsive behavior. ADHD children’s attention is not focused, easily distracted in class, absent-minded, seem to listen to non-listening, do not pay attention to the lecture, often look around or daze; careless, sloppy work, do homework drag, play while doing, homework is dirty and messy, often do less or do the wrong thing, easy to do things halfway, often lost, forget homework, books and so on. Secondly, children with ADHD have excessive small movements and increased language: for example, they are not quiet when sitting, as if there is a pinprick in the buttocks uncomfortable and wriggling around. A moment to go to the toilet, a moment and want to drink water, a little movement immediately ran over to check; class and do homework hands can not stop, always play with things, the edge of the book page rolled around. Some children do not have something to play in the hands of biting fingers and nails, biting pencils. Usually argumentative, love to interrupt, often in the classroom to make some noise or say something to cause others to laugh and attract the attention of others, making the whole classroom laugh. Can not move things he wants to move, such as fiddling with electric sockets, toppling the bottle of water, adults do not pay attention to the supervision will often be injured. Again, children with ADHD have poor impulse control. Waiting impatiently in line, interrupting others without listening to them, and failing to listen patiently to others are often prominent characteristics of these children. In severe cases, they often interfere with other children’s activities, clash with peers, and are unpopular. They run around the house and sometimes climb trees and walls without regard to danger. Are there any indicators for the diagnosis of ADHD? There are no clear laboratory indicators for the diagnosis of ADHD. There is no one place for blood, urine, and other lab tests, and there is no way to determine if a child has ADHD through indicators such as CT or MRI. Only with the joint cooperation of parents, children, doctors or teachers and other personnel, through observation, analysis and judgment of the child’s actual behavioral performance, combined with the results of physical examination, neurological examination, mental status examination, to make a comprehensive consideration. For example, a child who has just started kindergarten may also show hyperactivity or inattention because he or she has not yet adapted to the new environment. In order to comprehensively assess children’s behavioral problems, in addition to observation of clinical manifestations, behavioral rating scales and psychological tests are helpful in the diagnosis of ADHD.