The child was a 10-year-old boy who came to the clinic for treatment of mischievous hyperactivity and inattention in class. He was very active and intelligent since childhood, and started to study at the age of 5. He has been in the fifth grade and has never repeated a grade. Since he started school, he has been inattentive in class, his attention is distracted in class, and he rarely stays in class for more than ten minutes, he has many small movements, plays with pencils and textbooks, talks quietly to his classmates, disrupts the classroom order, does homework, writes in this book, draws in that book, or scribbles in the east and west, and cannot finish his work well. After school, they are particularly active, chasing and fighting with their classmates, often not afraid of danger, not knowing the importance, so they often fall and get hurt or fight with their classmates. Emotions are easy to impulsive, good tantrums. He is particularly fond of watching martial arts TV movies and imitating “heroic” behavior, so he often gets into trouble, is naughty and hyperactive since childhood, and is fond of destroying toys and other objects at home. The above mentioned conditions increased with age. The child was born at full term, with the umbilical cord wrapped around her neck and bruised skin. She was breastfed for 1 year, started kindergarten at the age of 3, and started school at the age of 5. He had normal growth and nutrition in early childhood, and was walking and talking at the age of 1. He was stubborn and willful. The family was financially well-off, and the parents were more likely to scold the child for being naughty. There was no history of major illnesses in early childhood. No other members of the family were seen in a similar situation, and there were no other psychological problems. Physical examination: The child was well developed, well nourished, clumsy in finger activities, and the rest of the general physical examination and neurological system were not abnormal. Mental status: clear consciousness, complete orientation, neat clothes, good passive contact, apparently inattentive, in conversation with the physician, immediately reacting to any sound outside the consultation room and asking the parents what the sound is outside. He is emotionally unstable and easily irritated, and when his mother complains about his medical history, he will make a big noise and rush out of the consultation room. He is self-aware and wants the physician to help him get well so that he can study well and get into high school. His workbook reflects many careless mistakes and is not neat. He is hyperactive in the consultation room, rummaging through things on the consultation room table and teasing and fighting with other children waiting for consultation. Diagnosis: ADHD.