Anxiety disorders are neurological disorders in which patients experience abnormalities in certain mental activities, such as emotional abnormalities and volitional behavioral abnormalities, and patients often have no perceptual abnormalities, thinking abnormalities, or abnormalities in cognitive functioning. Emotional abnormalities are often manifested as unexplained tension, anxiety, worry, fear, and fear of restlessness. Abnormalities of volitional behavior may be seen as fidgeting, walking around, shaking, or other somatic symptoms, which are often symptoms of autonomic dysfunction, such as tightness in the chest, shortness of breath, palpitations, shivering, dizziness, nausea, and frequent urination. People with anxiety disorders have unaffected social functioning, some awareness of the illness, feelings of distress, and are actively seeking treatment, and their ability to reality check is not impaired.