Neurosis is caused by the patient being under long-term tension and stress, with easy mental excitement and brain fatigue, often accompanied by emotional worries, irritability, sleep disorders, and muscle tension pain, etc. These symptoms cannot be attributed to brain and somatic diseases and other mental illnesses. These symptoms cannot be attributed to brain or body diseases or other mental illnesses. The symptoms are sometimes mild and sometimes severe, and the fluctuation of symptoms is related to psychosocial factors. Neurosis is a neurological disorder, the onset of which may be related to the following three factors: 1. Physiological factors: Some scholars believe that the type of neurological activity of neurasthenia patients mostly belongs to the weak or intermediate type, which is characterized by a weak inhibition process of the nervous system, a low excitation threshold, and often too rapid response to stimuli. Because of their relatively high and frequent excitability, patients are prone to fatigue, and eventually the nervous system will produce protective inhibition due to fatigue, which is the weakened regulatory function of the patient’s nervous system, and various symptoms of neurological disorders will appear. 2, psychological factors: neurasthenia patients have the following characteristics of their own personality, such as timidity, low self-esteem, sensitivity, suspicious, capricious, aggressive, impatient, poor self-control, etc. 3, stress factors: such as increased work and study load, various life time, life rhythm change, physical changes, infection, poisoning, etc. may become the precipitating or triggering conditions of neurasthenia. To sum up, neurasthenia is a dysfunctional disease that produces a series of symptoms of abnormal mental vitality and physiological dysfunction under the influence of certain physiological and psychological factors. Its symptoms are complex and varied and lack specificity, and should be treated under the guidance of a professional psychiatrist.