According to the development standards. To judge whether a child is healthy, we must take the normal mental development standard as the reference and the normal sequence and rate of mental development at different ages as the standard. Normal development standard is a statistical concept, which is the relative ratio of a group of children. Therefore, parents and teachers should know more about the general standards of children's psychological development at all ages, so as to make judgments on children's mental health. In daily life, we can judge children's mental health according to the following four aspects.
Health is the basic right of people and the first wealth of life. The traditional concept of health is health without disease, while the modern concept of health is overall health. According to the World Health Organization, health is not only the absence of diseases in the body, but also mental health, good social adaptation and morality.