1, ADHD and naughty characteristics are not the same naughty children to an unfamiliar occasion, such as attending a solemn party, the child in front of a period of time will have a sense of strangeness and distance, afraid to move, because the surrounding environment and people are not familiar, only after he is familiar with the surrounding environment and people he will show his original appearance, that is, naughty children have a process of adaptation to the surrounding, and ADHD Children with ADHD do not have this process. A naughty child is afraid to go to the hospital to see a doctor, but an ADHD child will not feel this way, and will be familiar with the doctor, going through the doctor’s pockets, grabbing pens, etc., without any sense of distance or strangeness; rummaging through the items in the consultation room, not being quiet for a moment, giving people a dazzling feeling. 2, for school children can be distinguished by doing things like homework Naughty children may be able to complete an hour of homework in 40 minutes or even less, he wants to set aside time for himself to play a little longer; while children with ADHD will do homework for a long time, an hour of homework may not be completed for 3 hours. Naughty children scribble but do not procrastinate, while ADHD children scribble and procrastinate. As they grow older, naughty children become more self-controlled and learn better, while ADHD children’s academic performance deteriorates if they do not intervene, and their grades rise quickly if parents and teachers hold on to them, and fall quickly if they relax a little.