ADHD or Attention Deficit Hyperactivity Disorder, commonly known as ADHD, is a mental illness. Patients have symptoms such as attention deficit, hyperactivity, impulsive behavior, learning difficulties, and neurological deficits. 1. Attention deficit. This is characterized by inattention and short attention span. 2. Hyperactivity. The child cannot stay quietly in his seat and has active hands and feet. Will leave his seat without authorization in quiet situations and run around. Difficulty in staying quiet and staying busy throughout the day. 3. Impulsive behavior. Answers questions before the teacher has finished asking them. Interrupts others when they are speaking. Acts impulsively, does things without regard for consequences, and acts on whim. 4. Learning difficulties. Because of poor concentration, the child listens poorly in class and completes little homework. 5. Poor neurological development. Incompetence in finger movements, hand turning, tying shoelaces and buttons, and difficulty in distinguishing between left and right directions. The patient’s coordinated movement, fine motor and spatial position sense are poorly developed. A small number of patients also have delayed language development, poor expressive skills, and lower intelligence than their peers. The pathogenesis of this disease is still unclear, and it is generally believed that this disease may be related to genetic, developmental, social and environmental factors. Parents are advised to pay attention to the disease and take their children to the doctor as soon as possible for reasonable treatment.