Childhood ADHD, also known as attention deficit hyperactivity disorder (ADHD), can begin at age 3. These children have normal or near-normal intelligence, but have deficits in learning, behavior and emotion. (1) Excessive activity: the child is extra active, often non-stop, can’t sit still, talk a lot, etc. (2) Difficulty in concentration: such as not being able to listen quietly, do homework, careless, lose things, etc. (3) Impulsive behavior: the child has poor self-control, irritability, crying, impulsivity, etc. (3) Impulsive behavior: the child’s poor self-control, irritability, crying, and impulsiveness. Attention deficit, excessive activity and impulsive behavior are the core symptoms of ADHD and usually have diagnostic value. (1) Neurophysiological tests: including EEG and other tests, which can directly detect the overall physiological functions of the nervous system; (2) Behavioral tests: interviews with the child, parents and teachers, and direct testing and evaluation through behavioral scales; (3) Psychological tests: including intelligence tests, attention tests and other psychological tests to assess the severity. (2) How to treat ADHD in children The treatment of ADHD in children is based on comprehensive treatment, including medication, psychological, exercise and behavioral therapy, as follows: 1. Behavior therapy: mainly in self-management, time management, school and family behavior control, etc. 3, how to prevent children’s hyperactivity disorder children’s hyperactivity disorder can be prevented in advance, its preventive measures are as follows: 1, advocate premarital examination, avoid inbreeding marriage; 2, marriage at an appropriate age, do not marry early, early pregnancy, and do not marry too late, late pregnancy; 3, in order to avoid birth injuries, reduce the chance of brain damage, it is recommended that the first choice of natural birth; 4, pregnant women should pay attention to temperament, keep a happy mood; 5, careful use of drugs, prohibit tobacco and alcohol, avoid To avoid poisoning, trauma and other factors; 6. Create a warm and harmonious living environment for the child.