This document discusses stress, its causes and effects, and ways to cope with and reduce stress. It defines stress as a feeling of tension, worry or threat resulting from demands placed on a person. Sources of stress include life changes, daily hassles, conflicts, and socioeconomic factors. Individual differences like hardiness and resilience impact responses to stress. Chronic stress can negatively impact physical health by suppressing the immune system and increasing risk of heart disease. Coping strategies include problem-focused approaches and emotion-focused approaches like relaxation. Treatment for stress-related disorders may involve psychotherapy and medication. Maintaining a healthy lifestyle and social support system can also help manage stress.