As just about everyone knows, that huge sum of money is used mainly for treating disease. To understand how you can reduce stress and therefore prevent disease, first we should define it. Stress is not a deadline to meet at work, a term paper, or even a traffic tie-up during rush hour. Stress is how we react, physically and mentally, to these experiences. If we've slept well at night and wake up fresh and rested, we're apt to handle any demand during the day far better than if we run into it, headlong, on a Friday afternoon at the end of a long week.
Any overload can cause it.
The sudden flash of a bulb from a camera can create stress in the eyes. Any experience, positive or negative, can create stress if the system is unable to handle it. Some say that stress is the spice of life. People who thrive on the continual stimulation of new challenges, new responsibilities, new pressures would hate to live without stress. It's true that new opportunities and new challenges are essential for a fulfilling life.