ADHD, also known as Attention Deficit Hyperactivity Disorder (ADHD), is a common behavioral disorder in children with normal or basically normal intelligence, but with deficits in learning, behavior and emotions. Parents and teachers often feel helpless in their daily lives. The prevalence of ADHD in children is reported to be between 5% and 10% in foreign countries, and more than 10% in domestic surveys. The etiology of ADHD in children 1, the number of neurotransmitters in the brain is insufficient. Such as norepinephrine, dopamine and other neurotransmitters in the brain concentration is reduced, weakening the inhibitory activities of the central nervous system, so that the child action increased. Therefore, medication must first be considered for children with ADHD. Parents of non-breast-fed children should pay particular attention to this cause. 2. Organic damage to brain tissue. The mother suffered from hypertension, hypertrophy of the thyroid gland, nephritis, anemia, low fever, pre-eclampsia, cold, etc. during pregnancy; abnormal delivery process; infection or trauma to the central nervous system within 1-2 years after the child’s birth. Such children are prone to ADHD. 3, genetic factors. A part of the view that congenital physical defects and organ abnormalities, chromosomal abnormalities, parental psychiatric disorders and other genetic factors will affect the child’s brain function to varying degrees, resulting in their congenital physical defects, resulting in hyperactivity. 4. Other factors. Inappropriate educational methods and early intellectual development in excess, environmental pressure far beyond the child’s mental capacity, resulting in the child’s mental development lag, self-control ability is reduced. In addition, excessive intake of artificial coloring in food and food containing excessive amounts of lead may lead to ADHD, although it does not necessarily reach lead poisoning. ADHD is a common behavioral problem in childhood. The disorder has two main symptoms, namely attention deficit and hyperactivity, and may be accompanied by behavioral impulsivity and learning difficulties. It usually begins before the age of 6 years, with symptoms becoming apparent during school age and gradually improving with age. In some cases, the symptoms may continue into adulthood. (1) Attention deficit disorder (also known as attention deficit disorder): Attention deficit disorder is one of the most important manifestations of the disorder. The child’s active attention is diminished and passive attention is increased, manifested by inattention, inability to pay attention in class, and easily distracted by environmental disturbances. The object of attention is frequently shifted from one activity to another. The student is not able to pay attention to homework, and is careless and rash in doing homework. Does not finish what he/she starts, often stops halfway or changes frequently. They procrastinate in doing homework, constantly interrupting with reasons such as drinking, eating, or urinating, and taking significantly longer to do homework. Some children may stare at one place, wander off, drift off, look at the teacher, but don’t know what is going on in their minds. When the teacher asks a question, the child often does not know what the question is about. Attention deficit is a necessary symptom for this disorder. (2) Hyperactivity: Hyperactivity is another common major symptom. This is manifested by an obvious increase in activity, excessive lack of quiet, running back and forth or small movements, inability to sit still in the classroom, often wriggling in their seats, or standing up, and in severe cases leaving their seats and walking around, or leaving the classroom without permission. Talk a lot, make a lot of noise, interrupt, cause trouble, and interfere with classroom discipline in order to attract the attention of others. They like to play dangerous games and often lose things. There are two types of hyperactivity: one is persistent hyperactivity. The child’s hyperactive behavior is seen at school, home and other occasions, often more serious. The second is situational hyperactivity. Hyperactive behavior is only seen in certain situations (mostly at school), but not in other situations (at home), and various functions are less impaired. (3) Impulsivity: emotional instability, easily provoked impulsivity, capriciousness, and poor self-control. Easily overexcited by external stimuli and easily frustrated. Behavior without considering the consequences, appear dangerous or destructive behavior, and will not learn lessons afterwards. (4) Learning difficulties: mainly manifested as low academic performance. Children with ADHD have normal or basically normal intelligence, and the reasons for learning difficulties are related to inattention and hyperactivity. The time when learning difficulties appear is determined by the level of intelligence and the severity of ADHD. Children with severe ADHD with low to moderate intelligence can develop learning difficulties early in their school years. Those with higher intelligence levels and milder ADHD symptoms may have learning difficulties only in middle school. (5) Neurological developmental disorders: about half of the children have neurological soft signs, such as clumsy rapid rotation movements, uncoordinated ataxic activities, inability to walk in a straight line, difficulty in standing with eyes closed, positive finger-nose test, fine motor inflexibility, and some children may have visual-motor disorders, spatial location awareness disorders, etc.