"If you're alive, you've got stress. Stress is a natural physical and mental reaction to both good and bad experiences that can be beneficial to your health and safety. Your body responds to stress by releasing hormones and increasing your heart and breathing rates. Your brain gets more oxygen, giving you an edge in responding to a problem. In the short term, stress helps you cope with tough situations.
Stress can be triggered by the pressures of everyday responsibilities at work and at home. As you might expect, negative life events like divorce or the death of a loved one cause stress. So can physical illness. Traumatic stress, brought on by war, disaster, or a violent attack, can keep your body's stress levels elevated far longer than is necessary for survival.
Chronic stress can cause a variety of symptoms and can affect your overall health and well-being."