Intrinsic factors are inherent subjective factors that a person has.
1, biological genetic factors
(1) Genetic factors. People's psychological activities or mental health cannot be inherited. The influence of hand genetic factors such as human body, temperament and intellectual activity characteristics is more significant. Relevant surveys and clinical observations show that there are a considerable proportion of family members with mental retardation, unsociable temperament, mania, depression and other mental diseases or abnormal psychological behavior in the families of mental patients.
(2) Chemical poisoning or brain injury. Harmful chemicals invade the human body and poison the central nervous system, such as food poisoning, gas poisoning, alcoholism and drug poisoning. , may lead to psychological disorders or mental disorders; Brain trauma such as concussion and brain contusion caused by various reasons may also lead to psychological obstacles such as consciousness disorder, amnesia, speech disorder and personality change.
(3) Bacterial or viral infection. If people suffer from infectious diseases of the central nervous system, such as typhus and epidemic encephalitis, they will suffer from organic psychological or mental disorders due to the damage of germs and viruses to the nervous tissue structure. If the patient is a child, it may inhibit psychological development and cause mental retardation or dementia.
(4) Physical disease or physiological dysfunction. Physical illness or physiological dysfunction is also one of the factors that affect mental health. For example, if you suffer from endocrine dysfunction, especially thyroid dysfunction and hyperthyroidism, patients often have psychological abnormalities such as irritability, irritability, sensitivity, emotional impulse, and weakened self-control; Excessive adrenaline secretion will lead to mania, while insufficient adrenaline secretion may lead to depression.