Physical health means that the human body conforms to normal physiological phenomena, that is, we usually say that there is no disease; Mental health is a person's cognitive, emotional, emotional and will, needs and motivation mental health.

To define mental health from the perspective of psychology, the basic criteria are:

1, with a basic sense of self-security; ?

2. Be able to know yourself well and properly evaluate your abilities;

3. The ideal life is practical;

4, not divorced from the surrounding real environment;

5, can maintain the integrity and harmony of personality;

6. Be good at learning from experience;

7. Be able to maintain good interpersonal relationships;

8. Be able to vent and control emotions moderately;

9, under the premise of meeting the requirements of the group, can properly meet the basic requirements of individuals.

How to keep the mental health of middle school students;

1, consciously learn psychological knowledge and seek mental health medicine;

2. Don't ask too much of yourself, set moderate goals and develop a "normal heart";

3. Don't expect too much from others to avoid disappointment;

4. Don't blindly compete with other students everywhere to avoid excessive tension;

5. Actively participate in collective activities and expand social contacts; ?

6. Strengthen will exercise and maintain an optimistic "positive mood".