The concepts of stress and stress response are as follows: 1. Stress: refers to external stimuli to the human body, which may be environmental or psychological strong stimuli, so that the patient appears nervous, or needs to face an event or a thing urgently, and is a physiological challenge that will often face; 2. Stress response: the body’s reaction and adjustment of the whole body functions in order to face stress, such as accepting a challenge or test, or when encountering danger, the body is The body’s preparation to deal with difficulties and challenges. Sympathetic excitation, adrenaline secretion, elevated blood pressure, dilated pupils, concentration, and the ability to react strongly enough to cope with environmental changes can occur. Therefore, stress and stress response are a chain reaction, and the presence of stress can produce a stress response.