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  1. Stress: What It Is, Symptoms, Management & Prevention

    Stress Stress is the natural reaction your body has when changes or challenges occur. It can result in many different physical, emotional and behavioral responses. Everyone experiences …

  2. Stress - World Health Organization (WHO)

    Feb 21, 2023 · Stress can be defined as a state of worry or mental tension caused by a difficult situation. Stress is a natural human response that prompts us to address challenges and …

  3. What Is Stress? Symptoms, Causes, Impact, Treatment, Coping

    Nov 9, 2025 · Key Takeaways Stress is your body's response to changes that require attention or action. Chronic stress can negatively impact your health and lead to mental health problems. …

  4. What is Stress? - The American Institute of Stress

    While people often define stress differently, common definitions include “physical, mental, or emotional strain or tension” and “a condition or feeling experienced when a person perceives …

  5. Stress - American Psychological Association (APA)

    Stress is a normal reaction to everyday pressures, but can become unhealthy when it upsets your day-to-day functioning. Stress involves changes affecting nearly every system of the body, …

  6. Stress | Description, Causes, & Effects | Britannica

    Jan 7, 2026 · Stress, any environmental or physical pressure that elicits a response from an organism. In most cases, stress promotes survival, forcing organisms to adapt to changing …

  7. Stress: Causes, types, effects, disorders, and treatments

    Dec 11, 2025 · Stress is both a physical and mental response to change. It’s a normal part of life, and it happens during positive and negative life experiences. As a short-term reaction, your …

  8. Stress - Psychology Today

    Stress generally refers to two things: the psychological perception of pressure, on the one hand, and the body's response to it, on the other, which involves multiple systems, from metabolism …

  9. Stress | NCCIH

    2 days ago · When you’re under stress, your body reacts by releasing hormones that produce the “fight-or-flight” response. Your heart rate, breathing rate, and blood pressure go up, your …

  10. What is Stress? Definition, Importance, Types, Classification, …

    In simple words, from the point of view of an individual, stress comprises of physical, mental and chemical reactions leading to the circumstances that endanger, confuse or irritate you. Poor …