ADHD, or attention deficit hyperactivity disorder, is characterized by age-appropriate attention difficulties, hyperactivity, and impulsivity in children with normal intelligence. Therefore, attention deficit, hyperactivity, and impulsivity are the three core symptoms of ADHD. What are the signs of attention deficit? 1. When learning to do things, he does not pay attention to details and often makes careless mistakes; 2. When learning to do things or playing, it is difficult to maintain concentration; (7-10 years old have less than 20 minutes of concentration, 10-12 years old have less than 25 minutes, and 12 years old and above have less than 30 minutes.) 3. often does not seem to listen or hear when others speak to him or her, and seems distracted; 4. often does homework or completes tasks in a sloppy manner and does not always follow the requirements; 5. has difficulty organizing the tasks or activities assigned to him or her; 6. is reluctant to do things that require continuous use of the brain (e.g., completing homework); 7. loses things and often loses school and living supplies such as pencils, notebooks, toys, etc.; 8. 8. is easily distracted by external stimuli; 9. is forgetful and has difficulty remembering things he is told to do in daily life. What are the signs of hyperactivity? 10.Always fidgeting, constantly squirming, and making small movements with hands and feet; 11.Leaving his seat without permission in the classroom or other situations that require sitting still; 12.Running and jumping around inappropriately (middle school students have a subjective feeling of not being able to sit still); 13.Inability to stay quiet for some leisure activities; 14.Often acting like a wind-up, full of energy and rarely resting; 15.Often talking too much. What are the signs of impulsiveness? 16.Shouting out answers without thinking before others finish asking questions; 17.Having difficulty waiting patiently in line in order; 18.Often disrupting or interrupting others’ conversations or activities. The above symptoms are also common in normal children, so what is the difference between ADHD and normal children’s hyperactivity? 1. Children with ADHD have more severe attention deficits, hyperactivity, and impulsivity than children of the same age. According to the prevalence rate of ADHD, which is about 6%, about 5 or 6 children in a class of 50 children are likely to have ADHD. Generally speaking, because teachers are in contact with a large number of children, there is a comparison, so the judgment is often more accurate than parents. 2. The number of symptoms has to be met. The diagnostic criteria require meeting 6 or more of the attention deficit entries (the first nine) or meeting 6 or more of the hyperactive-impulsive entries (the last nine), and if only 3 or 4 of them are met, it is not ADHD. 3. Symptoms appear from a young age and last for at least 6 months. Children with ADHD are often found to have higher activity levels than other children by their families from a young age, as reflected by their kindergarten teachers. And their attention deficit, hyperactivity, and impulsivity last for at least more than 6 months. If they have been fine before and have had attention problems in the last few months then other causes need to be considered. 4. Symptoms appear on more than 2 different occasions. Attention deficit, hyperactivity, and impulsivity in children with ADHD can occur in a variety of settings, including school, home, and outside parties. 5. Attention deficit, hyperactivity, and impulsivity affect the child’s social functioning. That is, the child’s attention deficit, hyperactivity, impulsivity, so that the child’s schooling is affected, or affect the relationship with peers, affect their relationship with parents, teachers, affect the child’s mood, etc.. 6. Exclude other causes of attention deficits, such as the presence of intellectual problems, emotional problems, or the occurrence of major events at home that have an impact on the child. The diagnosis of ADHD is based on a detailed understanding of the child’s performance at home, school and other different occasions, understanding the views of teachers, parents and other people around him, understanding the child’s own views of himself, observing the child’s performance, and evaluating his intellectual level and emotional state. If you suspect that a child has ADHD you should go to a professional hospital to get a clear diagnosis.