Stress is the body's response to any demand placed on it and can be caused by both external and internal factors. The effects of stress include emotional, physiological, cognitive, and behavioral impacts. While some stress is normal and can be motivating, too much stress without adequate coping resources can negatively impact health and well-being. It is important to learn to manage stress through awareness, reducing stressors when possible, moderating emotional and physical reactions, maintaining physical and emotional reserves, and using stress reduction techniques like exercise, relaxation, and social support.