To what extent can heredity affect the mental health level of individuals? This question is inconclusive, but one thing is certain: physiology is the basis of psychology, and if there is no sufficient physiological condition, people's psychological activities will be affected. Psychologists use genealogical analysis to study the influence of genetic factors on individual mental health. The results show that among the students with mental health problems, the proportion of middle school students with a history of hysteria, hyperactivity and inattention is obviously large. Domestic data show that 13.6% of ADHD children's family members have a history of ADHD, and 50% of them are parents or peers with similar medical history. Schizophrenia is a serious psychopathology. Pedigree analysis, twin study, foster children survey and other research methods show that heredity plays a very important role. 100 Among the children of schizophrenic patients, 10%~50% have the genetic structure leading to schizophrenia. Among these people, 5% will develop into early-onset schizophrenia, while the other 5% will develop into late-onset schizophrenia. However, it should be noted that as many as 40% of high-risk individuals do not suffer from schizophrenia. Richard Grieg and philip zimbardo's Psychology and Life, translated by Chloe Wang and Wang Su, People's Posts and Telecommunications Publishing House, 2003, p. 442. It can be seen that although genetic factors have a certain degree of influence on individual mental health, their functions are not doomed to be unchangeable. Heredity only provides one possibility. Whether an individual shows psychological obstacles or psychological abnormalities depends on the role of the acquired environment. In the interaction between heredity and environment, the bad development tendency determined by genetic factors can be prevented and corrected. In addition to genetic factors, diseases such as germs, virus interference, brain trauma, chemical poisoning and serious physical diseases may all lead to psychological disorders and even mental disorders. For example, infectious diseases of the central nervous system, such as cerebral syphilis and epidemic encephalitis, can lead to organic psychological disorders; Concussion and brain contusion may cause disturbance of consciousness, amnesia, speech disorder and personality change. Hyperthyroidism can cause psychological abnormalities such as sensitivity, irritability, irritability, emotional instability and weakened self-control, while hypothyroidism can cause the dullness of the whole psychological activity. It is found that compared with normal individuals, individuals with mental health problems have a larger proportion of serious diseases such as febrile convulsions and head injuries in the early stage, and the difference is obvious. The influence of physical diseases on their psychological activities may be slight, such as irritability, insomnia and anxiety. With the elimination of the disease, these psychological symptoms will disappear completely.