ADHD, clinically known as attention deficit hyperactivity disorder, is a neurological disorder that occurs in school-age children and can also continue into adulthood or develop in adulthood. There are no specific seven manifestations of ADHD because of the many causes of the disorder, including genetics, birth injuries, and psychosocial factors, as well as individual differences in symptoms. Usually, the main manifestations of ADHD are as follows: 1. Excessive activity: mainly including persistent excessive activity and contextual excessive activity. Patients with persistent hyperactivity are more serious and can be hyperactive regardless of the occasion, such as inability to remain sedentary at home or in the classroom, often running around, and also appear to be excessively noisy, disobedient to teacher orders and other behaviors. Situational hyperactivity is often manifested in school, especially in the classroom where quietness and discipline are required. Patients have more serious problems with talking, sudden wriggling, and bumping into the teacher. 2. Attention deficit: Patients are unable to listen carefully in class and are easily disturbed by external disturbances, such as the sound of others’ conversations, car horns, and birds chirping outside the window. When doing homework, patients also often appear to be distracted or careless and haphazard; 3. Impulsive behavior: patients appear to be emotionally unstable and easily agitated, as well as capricious, abnormally excited, and often quarrelsome with partners. The ADHD patients often interrupt their parents, teachers and peers regardless of the occasion, and do not consider the thoughts of others; 4, lack of self-confidence: most ADHD patients are easily frustrated, lack of self-confidence, often unable to persist in what they do; 5, learning difficulties: although the patient’s intelligence is normal or close to normal, but easily in the study of inattention, and then there are learning difficulties, resulting in poor academic performance; 6, neurodevelopmental disorders Neurodevelopmental disorders: Patients with persistent ADHD often have mental developmental problems and are often clumsy, unable to tie shoelaces and buttons by themselves, and some patients may have symptoms of delayed language development. In addition, ADHD patients often have other psychiatric disorders, such as conduct disorder, anxiety disorder, tic disorder, mood disorder, etc.