Stress is a physical, mental, and emotional response to life's changes and demands.

Stress is experienced in levels. Low levels may not be noticeable at all. Occasional, moderate stress can be positive and challenge people to act in creative and resourceful ways. High levels can be harmful, leading to chronic disease.

By	Healthwise Staff
Primary Medical Reviewer	Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer	Lisa S. Weinstock, MD - Psychiatry
Last Revised	April 20, 2011