Pediatric ADHD, medically known as mild brain dysfunction syndrome or mild brain dysfunction, is a common abnormal behavioral disorder in children. Its etiology is complex and may be related to a variety of factors such as genetics, birth injury, and environment. Children with this disorder suffer from inattention, excessive activity, impulsivity, and poor self-control, which may affect their academic performance. Children with ADHD have normal or basically normal intelligence and are often treated as normal, naughty children. The specific symptoms of ADHD are as follows: 1. Attention deficit: The core symptom of the disorder is an age-disproportionate concentration of attention and short attention span. The child usually has difficulty sustaining attention while listening to lectures, writing homework or other activities and is easily disturbed by external factors. They are unable to pay attention to details when studying and often make mistakes due to carelessness. Often intentionally avoid or are reluctant to engage in tasks that require long periods of sustained concentration, such as writing homework. Procrastinates and fails to complete homework or assigned tasks on time. The child usually tends to lose things, often loses toys and learning tools, forgets the daily schedule of activities, and even forgets homework assigned by the teacher. (2) Excessive activity: At least two of the following: (1) restlessness; (2) running a lot; (3) difficulty staying in the classroom seat; (4) lying in bed and often twisting and turning; (5) busy all day long; (6) hyperactivity starts before the age of 7. (6) hyperactivity began to appear before the age of 7. The above-mentioned manifestations lasted for at least 6 months. (3) Impulsive behavior: doing things impulsively, reckless, acting on the basis of momentary interest, often fighting or disputes with peers. Interrupting or interrupting others when they are talking, impatient to answer before the teacher finishes the question, and unable to wait patiently in line. 4. Abnormal neurological development: The child has poor development of fine motor, coordinated motor and spatial sensory, such as flipping hands, finger movements, tying shoelaces and buttoning, and difficulty in distinguishing left from right. A small number of children have delayed language development, poor language expression and low intelligence. 5. Character disorders: abusing others, fighting with classmates, destroying objects, abusing others and animals, robbing, etc., and doing behaviors that do not conform to moral and social norms, such as lying, truancy, running away from home, arson, stealing, etc.