Many patients with neurasthenia have bad personality traits before the disease, such as low self-esteem, sensitivity, suspiciousness, lack of self-confidence or being on the subjective side, impatience, eagerness to win, easy to adjust to the tension of life events, so that the brain is in a long-term continuous tension and the onset of the disease. Most scholars believe that mental factors are the main cause of neurasthenia, and any factors that can cause continuous tension and long-term internal conflicts, so that the process of nervous activity is strongly and persistently in a state of tension, exceeding the tolerance limit of the nervous system tension can develop. For example, excessive fatigue without rest, excessive tension in the excitation process, dissatisfaction with the present state, frequent changes in the living environment without adaptation, leaving the central nervous system in a state of excessive tension and fatigue, the nerve cells of the cerebral cortex have a fairly high tolerance. After intense mental work, although fatigue is produced, it can be recovered after a little rest or sleep. Neurological activity in a state of intense tension for a long time may also produce neurasthenia once the tolerance limit is exceeded.