Neurosis is a common psychological disorder. It is a mental state in which the brain functions are mildly disturbed due to long-term sustained overstrain in the higher nervous system. It is a type of neurological disorder in which the spirit is easily excited and the brain is easily fatigued, often with emotional troubles and psychophysiological symptoms. The pathological mechanism that causes neurasthenia is complex, and although experts at home and abroad have done a lot of research work on it, the cause of neurasthenia is still not very clear. After investigation and research, it is generally believed that neurasthenia is closely related to the following three factors. 1, the triggering factors mainly refers to the various psychosocial factors that lead to neurasthenia. Various psychosocial factors that cause excessive tension in the function of the nervous system can become the precipitating factors of this disease. With the rapid economic development, social industrialization, population urbanization, dense housing, traffic congestion, fierce competition, unemployment, layoffs, disparity in personal income, and certain undesirable phenomena in society will make people’s mental tension. Life events that happen around us, if too much happens and the changes are great, can also make people hang on, such as stockholders on the rise and fall of the stock, if too involved, can also cause a serious psychological burden, and eventually cause neurasthenia. Long-term mental or psychological trauma, such as family disputes, marital misfortune, loss of love, neighborhood tension, etc., can also make people too nervous, psychological overload and neurasthenia. Excessive time for brain activity and excessive study load, especially when poor academic performance and major examination setbacks, often cause neurological overload and become an important cause of neurasthenia in students. Modern research shows that mental stimulation can cause endocrine and plant nerve dysfunction, such as the stimulation of panic can promote the release of adrenaline, resulting in a faster heart rate, red face and sweating, increased blood pressure, etc.. These changes in the internal environment may cause brain dysfunction, so there are also abnormalities in brain electrical activity. 2, susceptibility factors Internal factors are the basis for change, external factors are the conditions under which things change. This is also true for neurasthenia development, why in the same living and working environment, some people suffer from neurasthenia, while most people do not. Here there is a susceptibility factor, including genetic and personality type, age, gender and other factors. Neurosis has a lot to do with a person’s personality. It is generally believed that people who are introverted and emotionally unstable tend to be sentimental; anxious, conservative, quiet and other characteristics are prone to neurosis. They often have no special interests and are hardly ever very happy. Believing in the way of health, loving tonic food, sensitive to changes in lifestyle habits, overly attentive to their own feelings, fond of reading medical books and easily influenced by them to feel ill. Pavlov believes that people whose type of higher nervous activity is weak and intermediate are prone to neurasthenia. These individuals tend to be withdrawn, timid, sensitive, suspicious, impatient or easily tense when things go wrong, etc. 3, maintenance factors refers to the social and cultural background of the patient and the feedback information attached to the individual’s illness, which makes the disease form a vicious circle and persist. In general, the etiology and pathogenesis of neurasthenia are still not fully understood. However, most believe that it is caused by psychosocial stress exceeding what the patient can tolerate and overstressed neurological function, which involves many elements of society, family environment psychology, and personality.