As humans, we all have a tolerance for managing stress. The terms eustress means stress which is positively managed by the body and mind to beneficial effect. Exciting or stressful events cause a chemical response in the body which gives us a little more energy and drive to do more and to motivate us in our task. Eustress is a helpful and positive product of a nervous system response to challenge. Without eustress, our well-being can actually suffer. It helps us stay motivated, work toward goals, and feel good about life.