Children with inattentiveness are often inattentive in class, inattentive when doing homework, careless, inattentive, inattentive, inattentive, inattentive, inattentive, and inattentive. There are many reasons for children’s inattentiveness, including severe intrauterine infections or neurodevelopmental disorders caused by smoking, alcohol consumption, cocaine use, etc. In addition, some social and family factors, such as parental incompetence and indulgence in bad habits, may also cause children’s inattentiveness. Some children’s inattention may be related to the deficiency of trace elements zinc and iron or high lead, but there is no evidence that the deficiency of trace elements is the main cause of inattention. For children who are inattentive in class, first of all, we should consider whether the content of the teacher’s lecture is attractive to the child, and secondly, parents should pay attention to the child’s physical condition. If, in addition to inattention, the child has symptoms such as excessive small movements, impulsiveness, poor self-control, emotional instability and learning difficulties, the child needs to be seen by a doctor in a timely manner.