Conversion disorder begins with some stressor, trauma, or psychological distress. Avoidance of the emotional distress will distract from the negative feelings associated with the stressor. Brief psychotic disorder without a stressor. In cases of conversion disorder, there is a psychological stressor. A passive response is often characterized by an emotional numbness or ignorance of a stressor. Anticipating and reacting to a future stressor is known as "proactive coping" or future-oriented coping. Sexual dysfunction is a stressor in relationships. Eustress results when a person perceives a stressor as positive. The threat of negative evaluation is the social stressor. The effects of a stressor or drug generally depend on the exposure time. Running or any other form of exercise is considered an acute stressor. First, observing overt conflict between parents is a direct stressor for children. The kidneys release glucose, providing energy to combat or flee the stressor. This particular protein can be modulated by using heat as a stressor. Often, this type of stressor includes conflicts with other people.