Anxiety disorder is a common psychological disorder that occurs mostly in the young and middle-aged population. The exact cause is not known, but the triggering factors are mainly related to the person’s personality and environment. Medical science often divides anxiety disorders into two categories: chronic anxiety and acute anxiety. Chronic anxiety is typically characterized by unexplained nervousness and worry, irritability, fear and dread, constant fear of something bad happening in the future, sensitivity to changes in the external environment, fidgeting, inability to concentrate, and not knowing why one is so frightened. Patients are usually accompanied by physical discomfort, such as insomnia, panic attacks, chest tightness, gas shutdown, hand tremors, sweating, and frequent urination. The typical symptoms of acute anxiety are: an inexplicable feeling of extreme fear, dread, nervousness and anxiety, a sense of impending disaster, fear of losing control, or even a sense of imminent death (near-death feeling). However, there is no significant abnormality in all physical examinations of the patient. If you or your family members experience these symptoms, please consult the psychosomatic medicine/psychology department at the hospital.