Inexplicable nervousness in is mainly caused by overexcitation of sympathetic nerves. Sympathetic excitement can cause the whole organism to be in a state of stress, with inexplicable nervousness, worry, fear, dread and somatic discomfort experiences, especially from the skeletal muscles. For example, the patient experiences dizziness, headache, scalp tingling, panic, palpitations, chest tightness, shortness of breath, dyspnea, obstructive sensation in the throat, frequent urination, urgent urination, gastrointestinal discomfort, and profuse sweating. Under the effect of mental anxiety and somatic anxiety, patients show irritability, fidgeting, rubbing their hands and feet, panic attacks, and may even experience panic, lifelong sadness and other related situations, which seriously affect the work, study, life, family and social functions of patients. For inexplicable nervousness, repeated relaxation training can be done clinically by means of behavioral training, such as relaxation training. The development of automated relaxation training, in which the body becomes habituated to relax when tension arises, has significant benefits for the patient’s anxiety. If the situation continues to worsen and seriously affects social and occupational functioning, systematic medication is required to obtain significant improvement.